Hehehe one great trick is this..
Install a Remote program (VNC/Dameware) use it to take control over another PC with a remote program; lock it's keyboard/mouse, and use that computer to take over your own computer...
For more fun, use the lock keyboard/mouse option when taking over your own PC.
As for the WinUAE question, I think this was requested before (Or was that *mithlon?), but it is not the aim of the UAE project