It's not a currency.  It's an anonymous banking system, or more precisely an asset exchange service.

It's very interesting, though.  I could use that for my brokerage project.

PS.  I've ust read the FAQ.  It's pretty cool.  I don't like the centralized aspect, though.

I think it would be a good candidate for an other implementation of bitcoin concepts.  Basically it would be the same service as Loom, but it would work in a decentralised manner, using bitcoin's time server.

This could be neat, but it has to be more thought through.

PS#2.  Hum, it's open source !  This is good, for it means anyone can run his own loom server.  This makes decentralisation not necessary.

You can run your own loom server. But the assets you store on one server are still subject to a single point of failure.
So decentralisation is stilll 'neccesary' if you want to be protected against simply disappearing, cheating or defection of that node.

Can't people do the same with bitcoin addresses?

Erm, guess private key to bitcoin address?

It's enough to be able to spend the coins associated to one address.

Then again, both loom hashes and bitcoin private keys are huge. Simply guessing is not a vulnerability you should be worried about in either case. Do the math.

Still, you have to know how many coins he has, otherwise the transaction will be invalid. Am i rigth ?
So this makes things insanely difficult.

Either you try to brute force private keys with simultaneous sending small amounts, which won't be very profittable, or you can try big amounts and risk producing invalid transactions.

Well, you can have multiple addresses and receive money to the other one, so probably no.
And the address is not exactly the same as public key, is it ?