Brilliant! 8)
Just one thing I have to ask you about: Since you have developed these nice demos on ATI hardware (8500 and later 9700 P AFAIR) there is bound to be some questions about whether they take optimal advantage of nVidias hardware - especially the FX line with their 'twitchy' shader architecture.
It may not mean a damn thing, but you might wanna consider doing some kind of disclamer anyway before the benchmarking takes of in a big way.