I've tried it at home on my GF2 and it works... kind of... Actually it should not start becouse of "CG Error", but when I tried it I could run around with strange looking white/bright shadows... Tried it on GF3 with almost the same result but then the shadows went completly black... In both cases it sholud give CG Error. I'm guessing maybe some drivers allow you to run anyway.
Strange that it didn't work on NT4 and XP. It's been tested on XP and 2K. I even tested it on a fresh XP installation with Java just to make sure that it would work. Maybe there is some issues with differing versions of OpenAL32.dll in the system32 directory.
You can find the requirements and some troubleshooting in the manual (pdf document).
This is a very early beta (more of a tech-demo)... next beta (comming after the summer I would guess) will have fixed the bugs in the menus and also have Java Webstart
Thanks for your input. Keep it comming