55nm GT200 (GT200-400) on the way?

[alexio]

I think the bigger reason for the push to 55nm is to save money anyways. You can put a lot more die per wafer and improve yields dramatically.

Surely that is true, but don't forget that Nvidia has been very arrogant lately. They really really don't want the HD4870x2 to be the fastest graphics card available. It is possible that they sell a very limited number of cards based on the 55nm GT200-400 (with more active components) to not lose face. I doubt it, but you never know.