Yeah well, before hercules went backrupt a couple of years back they made graphics cards based on pretty much any mainstream graphics chipset.
At one time, they had cards based on S3, nVidia, 3Dfx, and one or two other long forgotten chipset makers.
I am also waiting to see how the Gigabyte Radeon 8500 card appears to perform as in the past Gigabyte have always produced cards with a fair few overclocking features and slightly higher than standard clock-rates.