I have no experience with mouse alternatives (it's a loyalty thing) but I have really enjoyed my ergomatic keyboard (Microsoft version). As much as I hate to praise anything with the antichrist's logo on it, MS makes a fine ergo keyboard.

If I had one complaint it's that you can't type the 6 with your right hand like they taught us in typing back in 11th grade. Then again if I have a lot of numbers to crunch I use the keypad.

Alex
O..O
=o=