BTW, I've done the same with my pc set up for years. Fun being ambidextrous, and it can really mess with co-workers who try to use your desktop. 
Same, here. I had an old boss who used to get pissed because he'd want to use my computer and the mouse was on the "wrong side."
On my desk at home I have my Windows mouse on the left with buttons reverse and my Amiga mouse on the right. I switch my monitor to whichever machine I want to use and grab the appropriate mouse. Now if I just had a USB KVM switch (or just KM switch, or maybe just USB) I could use the same keyboard and mouse on both machines. But I have priorities higher than that, and I rather like my 4000 keyboard.