It is my pleasure to announce that Steam has officially given us a giant pile of keys for the Humble Indie Bundle 2. All those who have previously purchased Humble Indie Bundle 2 will find a Steam key redemption button at the top of their download page. Right now, your HIB2 Steam key will instantly activate Braid, Osmos and Machinarium. Once Revenge of the Titans and Cortex Command make their official debut on Steam, they will automatically be added to your library as well.
We have a few hundred thousand Steam keys so we probably have enough to cover the whole promotion, but just in case, you might want to buy the bundle now. If we run out of keys, there's no guarantee that we will be able to get more.
We are also happy to announce that our friends from ModDB have launched their distribution platform Desura. So along with your Steam key, you'll find a code on your game download page that allows you to activate your bundle on Desura. Right now Desura is Windows-only but it should be another awesome way for many bundlers to keep track of their games.
Happy holidays and thanks very much for your overwhelming support.