display fusion looks really cool but i miss 2 featues:
a) the possibility to close tasks on the main taskbar by middle mouse (instead of opening another instance )
b) the "show desktop; aero peek" button on the secondary taskbar
I am planning on implementing more Windows 7 features, like Aero Peek in future versions. However, I have no plans to change the middle-click behaviour right now, but it's now on my list.
I would love such a feature. I've gotten so used to close stuff with middle mouse button (in firefox, notepad++ and numerous other application). I would simply, LOVE it