I didn't know you could add that into GIMP. Pretty neat how you can get it now, for free!
http://www.blender3darchitect.com/2010/03/free-photoshop-cs5-content-aware-fill-with-the-gimp/
I am honestly baffled at the video card requirements still. There aren't even any mobile offerings certified. There's quite a few people who use laptops for editing, don't ask why they do...
Sucks to own a mobile quadro, but I don't think there's any gt200 derived mobile chips, or very few. I think GT200 supports a newer CUDA version than G80, so that along with a 1GB mandated frame buffer could be the reason.
I don't see why though. All this CUDA/OpenCL/DirectCompute stuff is going to die out if they start arbitrarily limiting it to only certain cards/vendors. IMO, everything from G80 onwards should be supported in any mainstream GPU accelerated app. Oh, and preferably opencl should be used, though that only gives some of the radeon 4xxx series support, and I think only the 5800 cards are reasonably fast at it.