By the way for notebook PC use I would recommend the following:
1. Logitech V500. Very cool design. The receiver can be totally hidden inside the moise when not in use and the capacitive touch pad for 4-way scrolling is kind of cool also.
http://www.logitech.com/index.cfm/products/details/CA/EN,CRID=2135,CONTENTID=9508
2. Microsoft Wireless Notebook Optical Mouse. This is the older model that came out about a year ago. I got one since it first came out and still using the same battery. Microsoft has their own optical tracking ASIC and their mouse products have incredible battery life.
http://www.microsoft.com/hardware/mouseandkeyboard/productdetails.aspx?pid=050
3. Microsoft Wireless Notebook Optical Mouse 4000. This is their latest model. Looks cooler than the previous model (in my opinion) and has the 4-way scroll wheel similar to the Tilt Wheel on their desktop mouse. It has a battery holder that slides out from the back of the mouse where the silver logo is. Tracking engine is the same as the previous model.
http://www.microsoft.com/hardware/mouseandkeyboard/productdetails.aspx?pid=045
4. If you want to get the top of the line notebook mouse then you can go for Microsoft Notebook Laser Mouse 6000. Same design as the WNOM 4000 but uses a laser tracking engine that allows you to track on more surfaces than conventional optical tracking engine.
http://www.microsoft.com/hardware/mouseandkeyboard/ProductDetails.aspx?pid=048