Another really cool thing, that probably won't make much of a difference to most people, but really did it for me, was that it is really simple to automate sysinternals desktops. In fact it is just three functions (OpenDesktop, SwitchDesktop, CloseDesktop). Although some of the others have plugins written for them (virtuawin in particular), I like the fact that I can write stuff for it easily, for example I like being able to switch by moving the mouse to a screen edge.