Thanks very much. I'll look into the Kinesis keyboard. I have a Microsoft Natural Ergonomic Keyboard 4000 connected to my MacBook Pro right now, but the design of the Kinesis looks interesting. My non-mouse hand (left) is the issue, but perhaps I will think of switching to a trackball as a preventative measure for my right hand. Fiftieth B'day coming up next month - don't get old! (actually, it's not that bad - yet).