I found that this article by Anandtech has a really great review of the new 200-series chips and what makes them different from the previous generation:
[url=“NVIDIA's 1.4 Billion Transistor GPU: GT200 Arrives as the GeForce GTX 280 & 260”]NVIDIA's 1.4 Billion Transistor GPU: GT200 Arrives as the GeForce GTX 280 & 260