Firstly some information about the NV36 (the GeForce FX 5700). Its core will be running at 500MHz and memory at 500MHz (1000MHz DDR). It is produced at the 0.13 micron process and will be available in Mid of September for about $300. They also state something about the performance : 4000-5000 Points in 3DMark2003, I really do not understand why they include this, because 3DMark2003 really is not a good test to indicate performance of graphic cards (Refers to the recent benchmark cheatings from both nVidia and ATI..).
This image, also from Dark-Crow, is a GPU roadmap from nVidia for 2003. According to it the NV36 (GeForce FX 5700) is planned for September. A little bit later the NV36X and NV40 will follow, maybe in Mid November at Comdex Fall in Las Vegas (from the 17th till the 20th of November 2003)? Not much is known about the NV36X but I think that it will be nearly identical to the NV36 with added support for the new PCI-Express inferface, just like the NV40.
A little bit later in the first half of 2004 we can expect the NV45, NV41 , NV43 and NV42. Verry little is known about those cards at the moment.
Source : Dark-Crow