You want to control two seperate computers from one keyboard and mouse. You're too cheap to get a KVM. Solution?
Synergy, a KM switcher (Keyboard/Mouse- you need a seperate monitor for each box you're running). And yes, there's a windows version, so this isn't just linux geeking.
A little setup work, and *boom*. You drag your mouse to one edge of a screen, and it moves to another computer's monitor. Copy-and-paste also works. It's _almost_ like having a dual monitor setup- you obviously can't move windows or drag and drop or anything.
But damn, it's a great way to annoy Cate (I installed it on her computer and am using mine as the server. She looks away, I start a solitaire game, she turns back and feels compelled to finish it- great fun.)