They range from the GTS 260M, with a core clock of 550MHz and 96 stream processors, down to the G210M clocked at 625MHz with just 16 stream processors. Nvidia has finally adopted GDDR5 memory in its GTS variants, and all offer support for DirectX 10.1; both inevitable upgrades considering AMD have supported them for a while. In addition, the new chips support CUDA, and all except the G210M offer built-in PhysX technology for GPU-bound physics calculations.
Nvidia says it has 100 design wins for the new chips, but could not disclose any of them, as products have yet to be announced by their respective makers. You can read more about the new parts here.