T3Desk is a slick, 3D window manager with Aero Peek support
Enter T3Desk, a Window manager which does exactly that. It's a bit of an alt-tab replacement and reminiscent of the Window arranging wizardry provided by Compiz.
One of my favorite features of T3Desk is that all applications you minimize are grouped in the T3 taskbar icon on Windows 7. Hover over it, and you'll get thumbnail previews of each app. Hover a specific thumbnail, and Aero Peek kicks in to display the program's shrunken 3D view.
Customization options abound, from zoom, perspective angle, and animation settings to custom sounds and hotkey support. I'd like to be able to customize the hotkeys as well, but it's a small shortcoming - the default ctrl + \ works nicely. Have a few applications you'd prefer not to include in a bulk minimize? No problem - simply add them to your exclude list.
T3Desk worked flawlessly on my Windows 7 x64 install, and the developers report that it will work on everything back to Windows 95. Nice!