I have a MS Natural 4000 too and I always make sure every computer I spend a lot of time on has one. I do really wish they made a model without the numeric keypad. I find it ironic that an ergonomic keyboard forces my right hand to reach to far for the mouse. There is another MS arc style keyboard with a separate bluetooth keypad but the keyboard isn't quite as good as the 4000.

Anyone know of an ergonomic keyboard as good as the 4000 without a keypad?