Those people are at it again. Choose your own price with multiple games. If you pay at least the current average you also get access to all the stuff in the first bunlde (including World of Goo). They've even got Steam working with it and all that jazz.
They are also paired up with the EFF and Child's Play and you get to allocate how your money gets divided up.http://www.humblebundle.com/
I love it when people do cool stuff like this. I typically donate to Child's Play anyhow, so this is a neat way of doing that.