Our friends at Vr-zone have one early bird, the 8600GTS that rocks really fast. With some voltage mods to VGPU and memory they pushed the core to 1006MHz with memory at 1265 MHz.
It seems that DAAMIT's RV630 will have to fight
hard against Nvida's G84 mainstream solution
as the 8600GTS might be super overclockable.
The Geforce 8600 GTS comes in two weeks and till than you can learn how to mod your next puppy here .