I went to check on the new average price paid for the
Humble Bundle 3. It was $6.04 when I bought it 11 days ago, now it is $6.70, but they have added 4 more games, meaning you just pay at least the average and you get 9 DRM-free games, for Windows, Mac, Linux, and Android (play on every system you own), and some even include soundtracks. You can pay whatever amount you feel is worthy, and can divvy up between charity, game devs, and tip for the distributors. Expires in 3 days.
Pay whatever and get Fieldrunners, Bit.Trip Beat, SpaceChem, Uplink (SpaceChem and Uplink require a tablet if you want to play on Android)
Pay at least $1 and get Steam keys for the first four
Pay more than the current average and get the first four PLUS Spirits, World of Goo, Osmos, Anomaly: Warzone Earth, and Edge (for every system and Steam keys)