Would you replace your numeric pad with a trackpad?
dunham: I probably would take the trade-off if it was a full multi-touch trackpad.  These days I work with my macbook pro sitting to the left of a full keyboard and monitor. I frequently reach over to the trackpad to gesture (mostly zooming and two/three finger scrolling) and use the mouse (on the right) to point.I'd also be interested in seeing a mighty mouse with a multitouch top.  (In lieu of buttons / ball.)