VR Zone claims NVIDIA is going to replace the GeForce 8800 GS by the GeForce 9600 GSO in May. The 9600 GSO is still based on the same G92 core with 96 stream processors but NVIDIA will give board makers a bit more freedom in their designs:
Apparently, GeForce 9600 GSO and 8800 GS are of the same G92 core with 96 stream processors but card makers are 100% free to design their own PCB and determine their own clocks. We can expect many variants of cards with different types of cooling coming up to be branded as Overclocked Edition. This rebranding move hopefully will boost the sale of the cards, be more price competitive against the ATI's offerings and clear the crippled G92 inventory.