I think I mistook the question.
I thought it's about getting started coding for Maemo 5 in Windows 7.
But it looks like it's about getting started using Maemo 5 in Windows7.

If you are looking for a way to run Maemo 5 (as the same one that you saw in the N900 video) in you PC, then you better wait for the hardware .... (and maybe use a VNC server )

People seems to miss-understand maemo 5, thinking of it as another open source ubuntu-like distribution for computers.

Somebody have to explain this before getting this board flooded by "how to run maemo 5" threads ....