[overthrow]

For a cheaper setup, I have a right-handed vertical mouse (Amazon $20 special) to the right of my keyboard, and a second left-handed mouse on the left, and I switch between them throughout the day. It makes my desk look a little silly, but it works great!

[RulerOf]

I've adopted a similarly-inspired setup with a tradtional mouse on the right and a touchpad on the left. I initially added the touchpad to assist with vertical scrolling on Mac OS, but now I move between the two depending on the task and it keeps my wrists happier.

[npunt]

Same setup here. Hoping for even more input devices in more places to spread the load. For instance there's also some folks building ergo keyboard with trackpads near the thumbs to replicate the MacBook experience of a trackpad below spacebar for the occasional pinch zoom or scroll. And having various buttons/knobs for specialized tasks would also be great.

[throwaway049]

Good idea.