The Inq says NVIDIA is also working on a 65nm version of this card, codenamed G8M:
Since we know how AMD executes, it is little wonder that Graphzilla is adding steam and preparing a new part. G8M is the codename for refreshed 8400, most notably in the segment of manufacturing. The gates in this new part are will shrink to 65 nanometres, additionally reducing power consumption and improving performance by allowing higher clocking.Also important is that the 65nm GeForce 8400 will support PCI Express Gen 2.
This is not all, since it will have new, and a not broken video processor. Codename for this video processing unit is VP3, instead of VP2 that is built inside current generation of chips. Most notably, this card should be able to run 1080p video stream, for a minuscule price of 45 USD or Euro.