Fanatec just announced a new wheel that is compatible with the PS3, 360, and PC.
http://fanatec.de/
It's the 911 GT2 wheel. The difference between this and the Porsche Turbo S wheel is the paint and the wheel material (alcantara vs smooth leather). It also looks like the new wheel doesn't come with pedals (which can be bought separately).
Personally I wish I had waited because I'd rather have the alcantara rather than the leather. I have it in the interior of my car and it is really nice and soft. Very similar to suede.