Microsoft Touch Mouse
Click here to Buy It Now at Microsoft, $80
Windows 7 has built into it a number of touch gestures similar to Mac OS X. To take advantage of those features, Microsoft built a special mouse: the Touch Mouse. Similar to Apple's Magic Mouse, the Touch Mouse features a big touch-senstive area that can be recognize one-, two-, and three-fingered gestures. Thanks to Microsoft's BlueTrack technology, you can use it virtually on any surface. Oh, and like most Microsoft mice, it's comfortable. There's one downside: it's only for Windows 7 computers.