I've been experimenting a lot with VMWare lately for a variety of reasons.  One feature I am really intrigued with is "Unity mode".  To give you an idea of this mode, here's a screen shot of VS 2010 beta, seemingly executing on my Windows XP desktop.  Except that it is only an illusion.  Unity mode allows me to display applications executing in a VM directly on my desktop.  In fact, the VS 2010 beta is executing on a Vista VM, but is mapped to parent OS desktop.  Pretty cool...