Lugradio's Stuart Langridge (who must I'm afraid get used to the idea that he will probably never receive as much noteriety for anything else he does as long as he lives), after a laptop purchase which can fairly be described as a fiasco, asks the question "Which video card should I buy?" for his desktop PC.
Among the answers is a link to an awesomely useful page: http://free3d.org
The page uses the fairly rough and ready benchmark of the glxgears screensaver frame rate to rank different combinations of hardware and free software. I'm quite pleased with my 930 frames-per-second result (Intel Corporation 82G965 Integrated Graphics Controller, Intel(R) Core(TM)2 CPU 4300 @ 1.80GHz), and my masculinity is not at all threatened by the >6000fps results at the top of the table. With figures like this, and two out of the three major 3D hardware manufacturers (AMD/ATI and Intel) actively providing free driver software (not to mention in one case complete hardware specsifications!), it's time to bury the myth that free software operating systems don't do good 3D.