I've just posted my review of the brand new top notch mouse coming from Redmond. If you want to know what to expect from the new Microsoft Wireless IntelliMouse Explorer be sure to read this complete review. Below is a snippet from it:

It’s a proven fact; a predominantly software company can be a great hardware manufacturer! The whole point in being a great hardware manufacturing company is to have ideas that clearly change the way users work. Back in 1998, Microsoft introduced the first real revolution for mice by taking off their balls. But this wasn't Microsoft's first feat: Microsoft has also been the first company to add a wheel to our mice. Replacing the old school mouse ball that was used since the seventies by an optical sensor was a genius idea, especially when this optical sensor doesn't require a special reflective pad. The success was instantaneous and Microsoft sold more than 5.5 million optical mice worldwide since 1999. Not only did the IntelliMouse Explorer have a gorgeous and sensual design but also was able to work on every kind of surface (apart from reflective surface). Unlike mice balls, optical mice do not fear dust so their longevity is exceptional! When Microsoft released the IntelliMouse Explorer, many of us, the power users or techno geeks, wanted it to be wireless. Our dream is now reality with the brand new Microsoft Wireless Intellimouse Explorer. Microsoft even goes further with the addition of a brand new 6000dpi sensor for an unrivalled accuracy along with some neat new technologies we’ll review in detail here.