It's called Mighty Mouse, sells for $49, and blogger (and Yahoo employee) Russell Beattie ran out to buy one of only 10 available at his nearest Apple store this morning.

His hands-on review includes step-by-step install photos.

The bottom line:

All in all, if you're the type of person that always throws the included Apple mice into a corner and buys a two-button mouse instead, but don't like sullying up your beautiful Mac with third party hardware, this is the mouse to have.

Don't miss the readers' comments at the end.