The Humble Bundle of Indie games I mentioned before has raised over US$1m for the developers and charities involved. I read on Ars that the source code to several of the games will be open sourced. Doesn’t look World of Goo will follow suit but that game is available on Wiiware so it probably has proprietary extensions that might be too difficult to remove.
I’m not sure under what license each game will be released under but at least Lagaru is now GPLed which is a good thing IMO. I wonder if the original developer will attempt to monetize this in any way? That will make an interesting case study.