There has been some speculation for a little while now that the forthcoming NV41 from Nvidia would wind up being marketed as the Geforce 6700. However, word from The Inquirer is that NV41 will become 6800.
This does make some sense. NV41 is not that much different from what's in 6800 already. Basically, its modified to use PCI Express - the clock speeds are exactly the same. NV41 based cards will be branded as Geforce 6800 PCIe and will come as PCIe cards only. So NV40 remains Geforce 6800STD AGP while NV41 becomes Geforce 6800STD PCIe.