Buy.com has Microsoft Explorer Mini Mouse - 5BA-00001 - $29.95 for $29.95 + free shipping.
A Notebook Mouse That Works on Virtually Any Surface.
The Microsoft® Explorer Mouse, with revolutionary Microsoft BlueTrack™ Technology, works more places than ever before, including on granite countertops, living room or airport carpets—even on a wood table or rough, unfinished park bench.
Features
Snap In and Go
Simply snap in the transceiver to turn off the mouse, saving battery life.
Reliable Wireless
Microsoft 2.4 GHz wireless delivers a reliable connection with up to a 30-foot range.
Sophisticated Design and Comfort
The glowing blue light effects and comfortable curved surfaces set your mouse apart.
Go Anywhere - Microsoft BlueTrack Technology™ combines the power of optical with the precision of laser for remarkable tracking on more surfaces.*
5-Button Mouse - Get quick access to the media, programs, and files you use most often with customizable buttons.
4-Way Scrolling - Scroll side to side as well as up and down.
Tech Specs
System Requirements:
Windows Vista®/Windows XP
100 MB
Mac OS X v10.2.x-10.5x
30 MB
USB Port
Microsoft Explorer Mini Mouse - 5BA-00001 - $29.95 FS 
