We've seen Skype phones crammed into computer mice before, but few of them look like anything we'd ever want to use. This new one looks perhaps a bit more usable, but it still has the same issues that plague every phone/mouse combo.
First, the good: It's a slider, so you won't have to use a mouse with buttons all over it. It has a little screen on it, so you can see details about your call while you're on it. The bad? Well, if you use the phone you won't be able to use your computer at the same time, as you'll be holding your mouse up to the side of your head. Yeah, not that useful. I don't see why phones that are designed to just work with Skype are popular when a headset is clearly the easiest way to go. Oh well, to each his/her own, I suppose.