NVIDIA's First 55nm GPU: GeForce 9800 GTX+ Preview
 

A very smart man at Intel once told me that when designing a microprocessor you can either build a new architecture, or move to a smaller manufacturing process, but you don't do both at the same time. The reason you don't do both is because it significantly complicates the design, validation and manufacturing processes - you want to instead limit the number of variables you're changing in order to guarantee a quick ramp up and good yields of your silicon.
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*Preview: Anandtech (http://anandtech.com/video/showdoc.aspx?i=3340)*

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