According to a report from The Reg we can expect the first 80nm chips from ATI on October 17.
Two graphics cards are expected on that date. The Radeon X1950 Pro and the Radeon X1650 XT.
The X1950 Pro - codenamed RV570 and fabbed at 80nm - contains 36 pixel shader engines in 12 parallel pipelines and eight vertex engines. The core is said to be clocked at 580MHz. It'll hook up to GDDR 3 video memory running at 1.4GHz.
The X1650 XT - aka RV560 - is also an 80nm part, the reports claim. This time there are eight pipelines feeding 24 pixel shaders. It will be clocked to 600MHz and, again, the memory will run at 1.4GHz, albeit over a 128-bit bus. The X1950 Pro apparently uses a 256-bit memory bus.