I would like to see a small program that when you hover over a taskbar item (one of the listed windows), instead of showing some miniature thumbnail (like in vista), Show and bring to front the actual window. If you really want to switch to that window, click on the taskbar item. If not, moving off the taskbar brings back the last focused window as-was. You could even go so far as to have the other windows "shaded" (partially transparent) in the background.
