Earth Village has completed a review on the new Logitech MX700 cordless optical mouse. It looks pretty nifty, but the $84 price tag made me barf:
By now, you should already know the advantages optical technology has over the traditional mechanical technology. Optical mice do not trap dust, are more precise than the traditional ones, and work well on almost any surface except glass. It is true, however, that there are several down sides to the optical technology used in the first generation of optical mice like the Microsoft IntelliMouse Explorer version 1.0. When you move your mouse very quickly the mouse pointer might skip or jump around the screen because the 2500 pictures per second taken by the optical sensor are not enough for the mouse to handle moves that exceed a maximum speed of 14 inches per second. In other words, the optical sensor cannot keep up with the speed at which you are moving the mouse, which results in a "loss" of the pointer on the screen. Even though Microsoft has updated the optical sensors in its optical mice product line to take 6000 pictures per second, which translates into a maximum speed of 30 to 37 inches per second at 400 dpi, they still are not as good as the MX sensor used by Logitech?s MX series mice.
The Logitech MX Optical Engine takes an astounding 8000 pictures per second at 800 dpi and is capable of handling mouse movements made at a speed of 40 inches per second. The sensor captures images at the rate of 4.7 megapixels per second, providing users with the greatest degree of accuracy the smoothest mouse movement ever. You won't have to worry about the "pointer skipping" even in fast paced games like Counter-Strike and Unreal Tournament 2003.
http://www.earthv.com/articles.asp?ArticleID=703
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