[DamnInteresting]

Seconded on the trackball. I was a trackball user for years until Microsoft discontinued their trackball ca. 2005, and I was unable to find a suitable replacement. A couple of years ago I was feeling some wrist pain from my conventional mouse, and reexamined the trackball offerings. After a couple of missteps with mediocre Kensington models, I found the Elecom HUGE Trackball. It is excellent, I am tempted to buy some backups in case they stop making it.

For the Mac users: I find that it is quite handy to keep a Magic Trackpad on the side of my keyboard opposite the trackball. I use it to make quick gestures such as switching desktops, showing all windows, etc.

[giancarlostoro]

Funny I'm currently using a Kensington one, I didnt like that it felt smaller, but I just realized this today, I got used to it already.

[DamnInteresting]

I tried two different models of Kensingtons. The first one felt fine to use, but it had a scroll ring around the ball, and this piece broke off after a few weeks. I got it replaced under warranty, and the next one broke the same way in a similar time frame. So I tried one of their other models, and it just didn't fit my hand well. It's now my emergency backup.