HotHardware.com published a preview on the NVIDIA GeForce 8M Mobile GPU

NVIDIA is unveiling a new line-up of GeForce 8 class mobile GPUs today, aptly named the GeForce 8M series. The GeForce 8M will initially
consist of five devices, the GeForce 8600M GT, 8600M GS, 8400M GT, 8400M GS and the 8400M G. We've got the pertinent details and specifications available right here in our article

NVIDIA GeForce 8M Mobile GPU Preview