The G92 version of the 8800 GTS debuted today.
It's speced with a 256-bit bus like the 8800 GT but has bumped up timings for all three clocks and an additional 16 stream processors.
Anandtech's review of the 8800 GTS 512
says the 8800 GT is still the best bang for the buck though.
I still think NVIDIA should have named these cards 8900 GT and 8900 GTS. It seems a better fit to me since the die shrink has made such a performance difference from the 90 nm version of these GPU's.