I just looked Anandtech's video card reviews and found that last linux video card comparison was almost a year old. Since a lot has happenend during that time, I think that it would be cool when Anand would put new review together with all latest video cards included. IMHO 3D hardware support under linux has greatly improved over a year and almost all 3D chipsets are supported. I couldn't find any decent reviews of newer graphic cards under linux from net so Anand has a chance to bring out first (very) good one
There shouldn't be any problems finding enough software to test with, Lokigames has made quite many popular games also avalible under linux. I'm just dying to see how GF3, Kryo2 and Radeon would compare under linux, also how big is performance delta with Microsoft operating systems...