Quite a while ago I played with a bit of free software called Yodm3D which provided a 3D virtual desktop manager for Windows and worked on Vista.

This is being turned into a commercial product called DeskSpace and I've just installed and tried their trial version and, so far, it's greatly improved over what was Yodm3D.

The main thing I notice is the perf - radically different (i.e. better) than what you used to get with the Yodm software.

I'll try this for the next 14 days and see how it goes. I've been using some kind of desktop manager for talks for a little while as it provides an easy way to switch between slides/demos without having to press ALT-TAB and minimize/maximize windows and so on.