I do have a few more bits of info for you now, however. For one thing, we'd previously thought NVIDIA's next chip would not be called a "GeForce," but it now looks like the power of brand equity has won another victory over felicitous product naming. I'd look for a new GeForce to debut tomorrow.
Also, this paper from Siggraph about "Ray Tracing on Programmable Graphics Hardware" hasn't gotten the attention it deserves. I would half expect NVIDIA to show a live demo on NV30 of real-time ray tracing. This would be an especially neat trick because NVIDIA could point to this feat as a major difference between NV30 and the Radeon 9700, which likely couldn't deliver the same effect in real time due to memory bandwidth constraints and limitations on the number of pixel ops per rendering pass.
What we don't know now is how soon NV30 will be available, and tomorrow may not answer that question for us. Rumors increasingly place the chip's actual availability some time after the first of the year.
I also wouldn't be shocked to see ATI debut a DDR-II-based variant of the Radeon 9700 at the show. The NV30 has a "DDR-II type memory," and ATI has already demonstrated a DDR-II-equipped Radeon 9700 card. Those cards could be available for real before NV30 is.