They are too generic though, you are correct. I have a design already, and if I sell out of my first batch I will be doing a custom hologram.

It is cool, and I respect that.

My real name is Rob Kohr, and my personal website is robkohr.com, and from there you can probably find a lot of info about me (probably more than Mike). I use RobKohr as my username everywhere (I am not much on being anonymous).

The private (and the public keys) never actually touch a hard drive. I generate them during the printing process for the bills, and they exist in an in-memory pdf file format going to my printer (the pdf file is not saved either). I use a Mac, which while not bulletproof, viruses are rather rare for. I also am a programmer at Intel, and know a little bit about security. My machine is behind a firewall.

I will be publishing the public keys (unless requested by the buyer) when they are shipped. The pre-shipping process is to scan the public keys with my phone and drop them in an email to the recipient of the bills.

The checkmark signifies that you funded it. This is verified with the QR code in the upper right hand corner (check out the first image) and it is a url to the balance at blockexplorer.com.

Update - Feb, 2012
Due to the increase in valuation, printcoins is now offering 0.1 BTC bills which are about equal to a $2 bill. Bills that are greater that 10 BTC have been taken offline. Also Ron Paul bills have been discontinued.

Update - Aug, 2012
You can now print your own: http://print.printcoins.com/

Update - Feb 28, 2012

These will now only be sold in bulk orders of 100. This will likely change back in May, but for now, the small orders are just not worth the time. I would like to sell plastic credit card format printcoins, so let me know if you would like to do bulk orders of these.

Updates - Jan 4, 2012


* Due to the rise in the value of bitcoins, bills are now cheaper (prices automatically adjust to mtgox)
* Denominated bills are back up for sale
* Paper stock is now significantly heavier - 32 lbs,  100% cotton
* Hologram size is now 12% larger
* Denominated bills are sold pre-funded. You don't fund them yourself.

----
Original Post

Physical Bitcoin Bills at http://printcoins.com





About

PrintCoins are a way to bring your bitcoins into the physical world.

PrintCoins come in a variety of denominations, each with their own color scheme based on standard poker chip values. And they are printed on 24lb paper that is made from 100% cotton.

There is also an "open" denomination bill that can be used like a blank check. You simply fund the bill with a specific amount, and then write the amount on the bill.

All bills come unfunded so your bitcoins remain in your digital wallet until you need them to fund the bills. To fund bills, you can use the public addresses sent to you via email when your order is shipped, or you can just scan the bill with a smartphone bitcoin wallet app (Android Wallet or InstaWallet).

Perfect for . . .

• Off grid transactions
• When you don't want to wait for a bitcoin transaction
• When you want to buy something from someone who is new to bitcoin.

Buy at:
http://printcoins.com

Does it rely on an another server to connect to? Does bitcoind need to be running on the web server? What is the source of the public addresses?

Does anyone have a command line script that can be used to create a public address from a private key. I don't want to need bitcoind installed.

Can be php, python, bash, or whatever I can use in linux.

I don't have my wallet encrypted, and tried to use pywallet on 0.4, and it threw an error because of the version number.

I went into the code, and changed maxversion from 32400 to 52400 and then imported into my wallet. Seemed to work fine.

(Warning, may kill your wallet)

I want to use bitcoind in the background on a merchant site to handle transactions, but JSON-RPC becomes unresponsive after about 24 hours (and not even doing any transactions). I am hoping 0.4 is a little more stable.

How do install on this system. Apt-get seems to be stuck with 0.3.24.

@all
The game is up now at http://constantsail.com !

@memvola

The previous version of the game had guilds, and they were pretty active. They will be back soon in the new version, along with port battles where people can work together to seize investments in a port.

@damnek

I have though of the same thing for this game. If I get enough users, I might run an alternative version of the game where 1000-in-game gold is = 1 BTC, and the game won't create new gold unless people put BTC in. When you do put BTC in, you get 50% for yourself, and 50% goes to the NPC port merchants and such. Everyone would compete for real gold.

I am not sure I would have a cash-out option, as that would require more security features, but I haven't ruled that idea out.

What web games do people know of that accept Bitcoin?

I just created this game for Ludum Dare game competition:
http://constantsail.com/

You can upgrade your account to have unlimited ships in your fleet using paypal or bitcoin.

Game Description:

Constant Sail is a real-time web-based massive multiplayer online pirate game (MMO) where you take to the high seas to explore, trade, fight pirates, or even become a pirate yourself.

Just print out your private keys.

up

I will be finishing up a pirate game called http://constantsail.com soon . It is web based and you can capture other players ships in pvp battles.

I'll be accepting payments in bitcoins for full membership. Let me know if you would be interested in playing.