Why stop at two mice? Get yourself 2 keyboards, each with trackpoint nubs, and a mouse and a touchpad! Probably the touchpad comes for free if your desktop is

Why stop at two mice? Get yourself 2 keyboards, each with trackpoint nubs, and a mouse and a touchpad! Probably the touchpad comes for free if your desktop is a laptop with a touchpad; mice are cheap -- there's a big tangled knot of them near where the desktop support people hang out where I work. The same goes for cheapo keyboards, though keyboards with touchpoint are a bit more thin on the ground. For a very long time I used 2 keyboards and one monitor, just because everyone else used 2 monitors and one keyboard. I'd use one keyboard for my left hand and another for my right hand; I'd randomly nudge the keyboards around the desk until I was comfortable with the setup and then nudge them around a bit later, just because. Also I had 2 mice -- a big messy desk workspace. Anyhow, it's not like we're stuck with PS/2 inputs -- USB lets you have as many input devices as you like. Lastly -- there's a bug in MacOS that for some reason the meta keys of one keyboard don't apply to key strokes from another keyboard. So left keyboard / left shift key and right keyboard letter a would result in an a glyph; while with windows (and perhaps linux; haven't tested) you'd get the "correct" output of "A".