FUD Zilla reports NVIDIA's GF104 GPU should find its way to the notebook market sometime this summer:
The Performance notebook market will definitely embrace GF104 chips. We are not sure if Nvidia decided to use the Geforce GTX 460M branding, but we believe it is very likely.
Since the desktop version of GF104 comes on July 14th we would expect to see some notebooks based on the same chips shortly after. This of course depends on OEM refresh cycles, but since the back to school perid starts in late July or early August, we would expect to see some designs by that time.