You Can Now Donate Bitcoins to the EFF
eff.org
eff.org
The interesting part is making the global DB immune to attack or takeover. Bitcoin relies on the long tail effect. The total compute power of the great number of honest users must outweigh that of a well-funded attacker. So long as this is true, token forgery is impossible.
However, given the lack of inherent value (or backing) in a coin hash, bitcoins can't be used as money, only as money-substitutes (IOUs with an indeterminate recepient). The Dollar itself is "backed" by the US government requiring taxes be paid in it.
http://www.bitcoin.org/smf/index.php?topic=804.0
What is bitcoin? It's a Neal Stephenson plot device! http://bitcoin.org