The NGOHQ have it on good authority that there will be four more members of the GeForce7 family introduced in the near future.

"Today we had the chance to speak with a very reliable, unofficial source who is very familiar with some of Nvidia’s plans. The same source gave us some news regarding additional members of the GeForce 7 family. Since this source is unofficial, consider the following information as a rumor: 7900GS, 7600GTX, 7600LE and 7300GT."