AnandTech on the NV40 vs. NV3x. A great piece on the differences between the current nVidia family (5900/5700 called the NV3x series internally) and the latest 6800 (called the NV40 internally).
My brother works over at nVidia, so its great to see them getting back on their feet. The performance of the new NV40 is awesome. About twice as fast as the lastest generation ATI 9800 Pro (R350 internally) and the nVidia 5900 (NV38).