Random Tip: Force quit frontmost application, force quit the Dock and force logoutIt happens to the best of us. The application freezes and it's full-screen or something so you can't get to the menus. Hold down Command-Shift-Option-Escape for 5 seconds to force quit the frontmost application. This is the standard Mac OS X >10.3 way.
But… I'm still looking for a (standard) keyboard shortcut that force quits and relaunches the Dock because a lot of seeming Mac OS X "freezes" are a result of the Dock going bonkers. As of now, the only way to do this is to use Ambrosia Software's excellent, free and EV Nova-inspired escapepod (PowerPC-only but may work in Rosetta) which enables keyboard shortcuts for force quitting and relaunching the Dock, force quitting the frontmost application and force logging out.
Oh, yeah, and in case you were interested in running the Finder under Super User permissions, this one is for you.