You may recall earlier this year, Wolfire games launched the first Humble Indie bundle, a pay-what-you-want for a back 5 indie games. You could then divide the results up between the developers and a few different charity organisations.
Now, the second Humble Indie Bundle is here. Same as the first, pay what you want and divide it up as you wish. I can personally vouch for the quality for two of the games in this bundle. Osmos is an excellent skill game with a relaxing soundtrack and I'm sure we've all at least heard of Braid.
So yes, I highly recommend this bundle. It's better than the first.
Speaking of the first bundle, I still have a few gift keys for it.