Yeah, I think World of Goo was the first game to actually work with the new 6xx/7xx 3D driver.
I was so happy that a Real Game ran that I even bought a copy of WOG.
It works perfect here on my Ubuntu/HD 2600 with radeon driver.
While we like the flexibilty and local adaptability of the Icons its too early for open source. It would be too easy to miss the fundamental values of GMS.