If you want some bitcoins to play with and you are in San Francisco, then just come by the Internet Archive and use our bitcoin converter box (honor based ATM). If you are not in SF, then please set these up in hacker spaces. It is fun, and currently it is going up so it is even profitable.
The Internet Archive is holding on to the bitcoins to keep the currency experiment going. I bought $1,000 worth of coins so I could make the bitcoin converter box at the Internet Archive and be able to give my friends 0.10 BTC when they got an address so they would ahve something to play with. the sushi place might cash in their BTC's into our converter box (honor based ATM), but maybe not. For me, the key to make a currency is to have it trade around before getting redeemed. We are in this for real.