Humble Indie Bundle - Are any of these games good candidates for a port to MorphOS?

I played World of Goo, for me its really good game

Me too! And 2d Boy even did a version for the Wii - but I don't think that game is going to be open sourced plus I wouldn't be surprised if the Radeon 9x00 cards most MorphOS users have would be stretched to their limits to do that game justice. But it's still great to see more high quality games becoming open source.