Microsoft has been making mice for a while, but they do not tend to aim for gamers.  This changes with Habu, a mouse designed by both Microsoft and Razer.  As you might expect, 2000DPI and on the fly sensitivity change is included, but the LEDs are a nice touch.  You can read more about this collaboration at I4U.
“First gaming mouse jointly developed my Microsoft and Razer. The fact that Habu is a wired mouse, makes it great for gamers. Yes, the wire will limit the movement up to certain degree but the benefits for having the wire outweighs that con. For example a term like Always-On Mode cuts the latency practically to zero. Imagine what this would do to the operating times with a wireless mouse.”

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