NVidia has been looking to pair up its chipsets with the Intel Atom processor, however Intel doesn't seem to want to play along. Intel has recently sent around a memo indicating that the Atom processor should only be used with it's i945GSE and i945GC chipsets.
That ought to turn NVidia toward Via and AMD for a netbook processor.
There still is a webpage from NVidia that says "NVidia GeForce 9400 plus Intel Atom". I guess the PR guys at NVidia didn't get Intel's message :-P