Ten Things I Dig About Panther
Subject:   Even better...
Date:   2003-12-13 20:02:11
From:   anonymous2
Command-Tab switching not only displays the running apps, but the display is also mouse interactive. Do a Command-Tab and continue to hold down Command and use your mouse to directly select the running app, rather than continuing to press Tab to cycle through the list.

On the other hand, Expose can be used w/o a mouse. Just tap the F9 or F10 key to activate, then use the arrow keys to cycle through the windows and use Return to select the high-lighted window.