Mikhailtech posted a review on the Microsoft Wireless Optical Desktop 5000
A quote from the article:
Microsoft Wireless Optical Desktop 5000 Review
With new processors and video cards being released in what seems like a weekly cycle, it's easy to forget the other important parts of a computer, namely the peripherals. I've been guilty of using a 5 year old keyboard with a PC that would have been cutting edge just a few months back. Of course there's nothing wrong with that, but there comes a point where an upgrade wouldn't hurt. Today we'll be looking at Microsoft's Wireless Optical Desktop 5000, a keyboard & mouse combo that aims to please.
Microsoft Wireless Optical Desktop 5000 Review