I was lucky enough to get a demo of this, and be on the beta list. It is from the good folks at Electric Rain, the makers of Swfit3D and more.
People complain there isn't enough innovation in software, and frankly they are right. But! But StandOut is packed with new ideas, it really makes you rethink things. One example is "flypaper" - you know that space that wasted background grey space when you have two or three windows opened. You have to check out what they've done with it, not just used, but very cleverly. I'm looking around for wasted pixels all the time now : ).
Lots more in there, cool UI, what can I say, check it out! Oh, and expect presentations to be a little less boring in the future : ).
http://www.erain.com/products/standout/publicbeta/