I don't think anyone has pointed out the obvious - that 6" x 6" is a VERY large touchpad. That is a benefit to me, but maybe not to someone with little desk space.
Just remember that the slide-to-close gesture on Win8 apps requires more movement space. Laptop users are complaining a lot about that one, and hopefully this touchpad will make that one easy for desktop and laptop alike. Or maybe M$ could just fix that bug...
12:30 CST Update: Backordered til 1/31. And price jumped back up to $49.99
There's a coupon code, and you can still add to cart. Still working as of 10:34AM PST.