GTX is the G200 GPU, it's too big and power hungry to be put in a laptop as is, and the G200B 55nm refresh is not on desktops yet so don't expect it to be anywhere near laptops where nV already dominates. If it's not ready for deasktops it's not gonna see laptops for months if ever.
Even the HD4K will be the HD4670 in mobile garb, not the HD48xx, because you need a balance of power consumption/heat and performance.
There are rumours of a Q1 refresh of the 9262 based onthe upcoming CLEVO refreshes they are based on, but like everything they are currently rumours. The last refresh was in July keeping the model # but changing some of the parts, the Q1 refresh will likely bring a # change as well like the D900->901 change. Nehalem in a laptop is expected in Q1 of 2009, as a desktop port, just like these, the mobilized version of Nehalem (Calpella) won't be until late '09.
And yes the GF9800MGTX in SLi is king, and by a big margin, especially compared to anything out there from ATi or anyone else.