Allthough the desktop graphic cards are just being released, information about the new mobile parts has been floating around the internet. There will be 3 different parts for each price class (value, mainstream & highend), all based on PCIe.

Value: G74M-Chip (Geforce 7200go) with 8 pipelines
Mainstream: G73M-Chip (Geforce 7600go) with 12 pipelines
High-end: G71M-Chip (Geforce 7800go) with 16 pipelines

The actual names are not set in stone yet, and can thus change later, but chances are that NVIDIA will stick with its current naming scheme. All these grapic cards will use the NVIDIA MXM layout, so notebook manufacturers do not need to completely redesign their board layout.

Another interesting timbit seems to be SLI in Notebooks, the 7600go and 7800go are SLI capable, while the 7200go will not be.

All (not just the value parts) will use TurboCache, and thus will be able to use system memory if needed.

All the details at PC-Erfahrung.de (german) 14.06.2005 "Der G7xM und SLI im Notebook"