My desktop PC has an GeForce 7800GS. A bit of a niche card that I bought a couple of years ago because my old MB has no PCI-e slot. It's probably the best AGP option available. The drivers have been updated very recently to attempt to solve issues with Fallout 3 and the alt-tab issue that I have with that game just like you. I'm not at home at the moment, so I don't have the version number handy, but it was the official Nvidia drivers that were current about 10 days ago.
The laptop uses a GeForce Go 7600 chipset. The drivers are current as of 27/02/2007, and when attempting to update them I am told that the drivers are the most current available. I guess that Nvidia doesn't update drivers for notebook cards very often...