“It’s not actually an Expose clone, because the window thumbnails are placed on a circle. You can cycle through them using the mouse or the keyboard. It has keyboard and mouse triggers, and in a future version it will include also speech recognition. You can even replace Win+TAB so that SmartFlip appears when the key combination is pressed.”

“You can download a beta version here: http://smartflip.110mb.com/SmartFlip.zip”

The author writes that you should experiment with the options dialog (which looks quite nice):