Got a Microsoft Wireless Notebook Optical Mouse for $35 CAD after tax (Price Match success at Staples)
Loved it, it's small, compact, USB receiver is so cool (it goes under the bottom)
only uses 1 AA instead of 2...absolutely loved it for this price.
I have MS notebook optical ($13 off eBay), IntelliMouse Explorer 4.0, Wireless Intelli. explorer, too many MS mice and I all love them. Logitech I think I only like MX510 and MX700 (V500 is too $$)