One of the coolest additions to Windows Vista would be an open source clone of Compiz Fusion for Vista... we might not be able to get all the effects, but we could definitely get the Desktop Cube effect.
There used to be an application called Yodm3d that did this(somewhat), but it was sold off and is no longer free or available, so I'd like to see the next one be open source.
With all the game developers writing code for windows, it seems like this would be a no-brainer... just tap into the new compositing engine and grab the window previews?
The How-To Geek would personally be willing to donate [EDIT-removed amount] towards this.
