this may change as a result of AMD's move if nVidia does not swiftly followed suit.
I still currently hold that NVidia 7 series and before is the better purchase for a Linux user looking for a graphics card. Right now, until at least tomorrow, it's the best supported option for everything out there.
Come tomorrow, it may be a differing story. I will be downloading 8.41 to see for myself. I've got a handful of GPUs from the range of suppored stuff and I've got a few torture tests I can run against them (Something other than just the popular games- they bench test against Quake3:Arena, Doom3, Quake4, etc...). I'm something of a tough customer and unless it survives the OpenGL SuperBible examples (And does it well- no failed runs of things, etc...), SPECViewPerf, and handles high frame rates for things like Ballistics, Bandits, X3, AND all the others, it falls short.