Shortcuts for Gutsy Compiz Fusion:

== 'Normal' Effects ==
 * Switch windows = Alt + Tab
 * Arrange and View All Windows = Moving the pointer to the top right screen corner turns on or off; clicking a window will zoom it to the front
 * Switch desktops on cube = Ctrl + Alt + Left/Right Arrow
 * Switch desktops on cube - with active window following = Ctrl + Shift + Alt + Left/Right Arrow
 * Rotate cube manually = Ctrl + Alt + left-click and grab an empty desktopspace.
 * Make window translucent/opaque = possible with the "transset" utility or Alt + wheel mouse
 * Zoom-in once = Super-key right-click
 * Zoom-in manually = Super-key + wheel mouse up
 * Zoom-out manually = Super-key + wheel mouse down
 * Move window = Alt + left-click
 * Snap Move window (will stick to borders) = Ctrl + Shift + left-click
 * Resize window = Alt + right-click
 * Bring up the window below the top window = Alt + middle-click

== 'Extra' Effects ==
 * Slow-motion = Shift + F10
 * Water = hold Ctrl+Super key
 * Rain = Shift-F9 

random shortcuts: http://en.opensuse.org/Compiz
more here: http://ubuntuforums.org/showthread.php?t=494548