3DMark has developed a price/performance rating based on its own benchmark scores by comparing the averages with price information collected from around the web. While the 3DMark benchamrks may be a little limited in their representation of the entire spectrum of GPU performance, this might be a good place to start since their are a myriad of GPUs out there with confusing names and specs.
It's nice to see ATI at the top of the list and I hope that people spend tehir money accordingly, but for me, I'm interested in seeing where the high-performance cards land on the list as we generally pay a slightly disproportionate premium for having the best cards- it can be expected that they're quite a bit lower on the pts/$ scale. It's actually quite surprising that the 8800GT and the 3870 are so high on the list, beating out cheapo previous generation powerhouses like the 7600GT