On Gizmodo. Nvidia's announced the GeForce GTX 260 and GTX 280.
Apparently, "The GTX 280 rocks 240 processing cores and 1GB of RAM, while the 260 comes with 192 cores and 896MB of memory, making them equally adept at generating eye-popping graphics or serious parallel computing and physics crunching."
Graphs and numbers through the link. The cards cost up to $650.