I think Sirius (Martti Malmi) is Satoshi Nakamoto...

[The Fool]

http://blog.sc5.fi/2013/02/sc5er-intro-the-bitcoin-guy/

This was posted a little more than a week ago:

It was 2009 when I was studying computer science at Helsinki University of Technology. Inspired by libertarian ideals, I came up with the idea of a decentralized Internet currency that cannot be controlled by any government or other single entity. I contacted some guy named Satoshi Nakamoto, who had drafted a technical proposal of such a system just a couple months earlier. He called it Bitcoin.

He was removed from the list of project developers on bitcoin.org in June 2011. The same time Satoshi left. He still owns the bitcoin.org and bitcointalk.org domains.

[cbeast]

That partially answers the question about the early adopters holding most of the bitcoins. The original programmer cashed out in 2011. That still does not prove he is Satoshi Nakamoto, but he probably knows who he is.

[Severian]

Besides my work, dancing latino dances 5 days a week and playing competitive Counter-Strike with friends, I’m trying to find some time to develop my next open source project: uncensorable P2P identity and reputation database. Hopefully you’ll hear more about that later.

Even if he isn't Satoshi, I hope he takes the time and develops this idea. It fits with where the tendency of P2P appears to be going.

[Liquid]

https://bitcointalk.org/index.php?action=profile;u=4

Martti Malmi (aka Sirius), a student of Aalto University in Finland, was one of the core developers early on in the project. Satoshi attributed some of the new features of version 0.2 to him here and he was the one making the first commits to the Sourceforge repository back in August 2009. He was removed from the list of project developers on bitcoin.org in June 2011.

As Andrew points out in his answer, both bitcoin.org and bitcointalk.org is owned by Martti. He is the administrator of the bitcointalk.org forums, still active there, and could most likely be contacted using the PM feature on the forums. Both Martti and Gavin Andresen (lead developer) have access to the bitcoin.org website.

Source

[The Fool]

That partially answers the question about the early adopters holding most of the bitcoins. The original programmer cashed out in 2011. That still does not prove he is Satoshi Nakamoto, but he probably knows who he is.

Another lead:

Investigations into the real identity of Satoshi Nakamoto have been attempted by The New Yorker and Fast Company. Fast Company's investigation brought up circumstantial evidence that indicated a link between a encryption patent filed by Neal King, Vladimir Oksman and Charles Bry on August 15, 2008 and the bitcoin.org domain name which was registered 72 hours later. The patent (#20100042841) contained networking and encryption technologies similar to bitcoin's. After textual analysis, the phrase "...computationally impractical to reverse." was found in both the patent application and bitcoin's whitepaper.[1] All three inventors explicitly denied being Satoshi Nakamoto.[17][18]...

https://en.wikipedia.org/wiki/Bitcoin
 

[theymos]

I was here for much of the time period that you're talking about, and I'd be very surprised if Sirius is Satoshi. Satoshi would have had to have gone to ridiculous lengths to create such a natural alt identity.

[ciphermonk]

Another lead:

Investigations into the real identity of Satoshi Nakamoto have been attempted by The New Yorker and Fast Company. Fast Company's investigation brought up circumstantial evidence that indicated a link between a encryption patent filed by Neal King, Vladimir Oksman and Charles Bry on August 15, 2008 and the bitcoin.org domain name which was registered 72 hours later. The patent (#20100042841) contained networking and encryption technologies similar to bitcoin's. After textual analysis, the phrase "...computationally impractical to reverse." was found in both the patent application and bitcoin's whitepaper.[1] All three inventors explicitly denied being Satoshi Nakamoto.[17][18]...

https://en.wikipedia.org/wiki/Bitcoin
 

I skimmed quickly through the patents filed by these gentlemen and I have yet to see one that somehow relates to bitcoin. Journalists are quick to arrive to the conclusion: "It sounds technical so it must be related to Bitcoin!" Maybe I'm wrong and didn't look close enough.

[The Fool]

Another lead:

Investigations into the real identity of Satoshi Nakamoto have been attempted by The New Yorker and Fast Company. Fast Company's investigation brought up circumstantial evidence that indicated a link between a encryption patent filed by Neal King, Vladimir Oksman and Charles Bry on August 15, 2008 and the bitcoin.org domain name which was registered 72 hours later. The patent (#20100042841) contained networking and encryption technologies similar to bitcoin's. After textual analysis, the phrase "...computationally impractical to reverse." was found in both the patent application and bitcoin's whitepaper.[1] All three inventors explicitly denied being Satoshi Nakamoto.[17][18]...

https://en.wikipedia.org/wiki/Bitcoin
 

I skimmed quickly through the patents filed by these gentlemen and I have yet to see one that somehow relates to bitcoin. Journalists are quick to arrive to the conclusion: "It sounds technical so it must be related to Bitcoin!" Maybe I'm wrong and didn't look close enough.

It's definitely a public key, private key transfer system they are describing.

[benjamindees]

I guess at some point it might be a good idea to verify that all of these people are alive and well and not, you know, in Gitmo.

[cbeast]

I guess at some point it might be a good idea to verify that all of these people are alive and well and not, you know, in Gitmo.

Oh, they are probably building a special rendition camp for bitcoiners. 

[marcus_of_augustus]

In the first protocol, every participant maintains a (separate) database
of how much money belongs to each pseudonym. These accounts collectively
define the ownership of money, and how these accounts are updated is the
subject of this protocol.

1. The creation of money. Anyone can create money by broadcasting the
solution to a previously unsolved computational problem. The only
conditions are that it must be easy to determine how much computing effort
it took to solve the problem and the solution must otherwise have no
value, either practical or intellectual. The number of monetary units
created is equal to the cost of the computing effort in terms of a
standard basket of commodities. For example if a problem takes 100 hours
to solve on the computer that solves it most economically, and it takes 3
standard baskets to purchase 100 hours of computing time on that computer
on the open market, then upon the broadcast of the solution to that
problem everyone credits the broadcaster's account by 3 units.

2. The transfer of money. If Alice (owner of pseudonym K_A) wishes to
transfer X units of money to Bob (owner of pseudonym K_B), she broadcasts
the message "I give X units of money to K_B" signed by K_A. Upon the
broadcast of this message, everyone debits K_A's account by X units and
credits K_B's account by X units, unless this would create a negative
balance in K_A's account in which case the message is ignored.

Wei Dai "b-money"-1998

[Gabi]

Who invented sha256 is satoshi!

[Technomage]

I highly doubt that Sirius is Satoshi. I know Martti personally and I've talked to him many times, and my impression is that he is not Satoshi and he also doesn't know who Satoshi is. My opinion is that with a 95% certainty it's not him. I've also met Vili Lehdonvirta whom has also been suspected of being Satoshi, and for him I can say with a 100% certainty that he is not Satoshi.

Personally I think that Satoshi is either someone from Trinity College in Ireland or a group of people from there. That is the most plausible lead I've seen on the hunt for Satoshi. I could be wrong though.

[kiba]

I highly doubt that Sirius is Satoshi. I know Martti personally and I've talked to him many times, and my impression is that he is not Satoshi and he also doesn't know who Satoshi is. My opinion is that with a 95% certainty it's not him. I've also met Vili Lehdonvirta whom has also been suspected of being Satoshi, and for him I can say with a 100% certainty that he is not Satoshi.

Personally I think that Satoshi is either someone from Trinity College in Ireland or a group of people from there. That is the most plausible lead I've seen on the hunt for Satoshi. I could be wrong though.

People suggests everything from a group of people to individual as "most likely".

[Cryptoman]

Somehow, knowing who Satoshi is would take a lot of the coolness factor away from Bitcoin.  I'd be willing to bet that he was one of the participants on the original cypherpunks mailing list.  Given the efforts that many of us went through to remain anonymous even back then (anyone remember anon.penet.fi or Freedom.net?), I doubt that knowing this would help anyone identify him.

[wachtwoord]

I highly doubt that Sirius is Satoshi. I know Martti personally and I've talked to him many times, and my impression is that he is not Satoshi and he also doesn't know who Satoshi is. My opinion is that with a 95% certainty it's not him. I've also met Vili Lehdonvirta whom has also been suspected of being Satoshi, and for him I can say with a 100% certainty that he is not Satoshi.

Personally I think that Satoshi is either someone from Trinity College in Ireland or a group of people from there. That is the most plausible lead I've seen on the hunt for Satoshi. I could be wrong though.

Be prepared to be asked to participate in a documentary by the Discovery Channel/The history Channel in 10-20 years time in which they search for the real Satoshi and come up with all sorts of conspiracy theories. It will be like the JFK documentaries and non-one will know for sure.

Oh and at some point the history channel will imply you said it could be aliens

[hahahafr]

Satoshi Nakamoto is not one person. It's the group of people that gave birth to this Bitcoin idea.

[axus]

If it's not the 3 guys who wrote the paper, it's Bram Cohen.

[kiba]

If it's not the 3 guys who wrote the paper, it's Bram Cohen.

Bram Cohen doesn't like bitcoin.

[jgarzik]

heh, no.

Sirius is one of the first bitcoin users/developers besides Satoshi.

He is still occasionally logs into the forums, and I just transferred full control of bitcointalk.org domain over to him last week.