Multi mouse question.

[Ishar]

It does, as always there are some caveats; I've never personally configured it, but I'm sure someone has, the ISboxer/Inner space community is fairly helpful:
http://isboxer.com/index.php/guides/22-using-multiple-computers

There are also Vetra's that broadcast USB devices, including mice I believe; though they are fairly expensive.

http://www.vetra.com/wow.html

Regarding legality of Powershell, the important thing the 1 keypress 1 action thing, at least for WoW. So, it'd probably depend on what you did with it. I'm not really familiar with it, though.

[Nejcha]

The vetra looks a lot nicer then my home made monster... hmmm

Thanks for the helpful links.