The X-bit guys have found a bit of clearing-up info about the 1GB 2900XT cards that have been turning the rumor mills of late. They're apparently being designed & created solely on the initiative of the manufacturers, & AMD/ATi are not in the picture. Interesting.

"However, Advanced Micro Devices has decided not to officially unveil higher-speed graphics card with 1GB of memory, possibly due to the lack of interest in picking up GPUs capable of operating at clock-speed higher than 742MHz, a costly task that may still not allow the company to capture a significant market share."