My sister and I are both using the Logitech MouseMan Dual Optical mouse and I must say, what a mouse. The MouseMan Dual features the “standard” 3button/wheel mouse configuration as well as toting an additional programmable side button and an innovative ergonomic design. The general shape of the mouse is slightly curved with a higher arc to the middle making for a comfortable fit. Perfect for people like me who make their living point-and-clicking all day. It’s a definite must have for the office. Check it out here
Oh, BTW, at the time of this posting it was selling for $27 (US). A good deal considering the $59 MSRP Logitech suggests and the $39 retail store price.