As I mentioned previously, I am a fan of fully customizing the look and feel of my windows machines. One of the applications I have been using a lot recently is called Deskspace, from Otaku Software. Deskspace is a virtual desktop manager but uses 3d and has some stunning visuals around it. When I am demoing I usually have one virtual desktop as my powerpoint deck, one as my code window, and one with my demos. The application lets you fully customize not only how you interact with the cubes but also how they look themselves.