The Inquirer has an interesting little article, covering everything from specs to prices for both ATI and NVIDIA releases for the remainder of this year. They claim NVIDIA's NV40 will regain the performance advantage, and could be in the shops in time for Christmas.
"The NV40-DX9 chip will have PS/VS 3.0 functionality and sophisticated OpenGL 2.0 fragment shading capabilities. 8x1 (only) plain architecture with two universal floating/integer ALU and one TMU on each pipe. So no more sophisticated schemes like 4x2 or 8x1 depending on the application, only raw power."
More information @ The Inquirer