Following previous post on 2D physics engines, see my post on Box2D, I have found the World of Goo game. It is just fantastic !
Besides the originality, the tenderness, the best wii game, or any other good reviews received by this game, what impacts me is that it has been created by only two guys (Kyle Gabler and Ron Carmel). There have been other "external" people involved in the development of the game, but everything goes to only two persons. This is a bit of hope for those developing their own games in the corner of their rooms and spending nights on it. Check out the interview of this guys here.
Just check the video or go to their website.