I've got some spare gifts in my Steam account.
- Deus Ex: Game of the Year Edition 3BTC
Portal 1BTC sold-out- Serious Sam HD: The First Encounter 6BTC
The Humble Indie Bundle keys redeem the following games on Steam:
- Braid (9.99USD on Steam)
- Machinarium (19.99USD on Steam)
- World of Goo (9.99USD on Steam)
- Aquaria (19.99USD on Steam)
- Gish (9.99USD on Steam)
- Penumbra (9.99USD on Steam)
- Lugaru HD (9.99USD on Steam)
- Osmos (9.99USD on Steam)
20BTC gets you all that, pretty sweet, huh?