If you are using Front Row and you want to quickly return to your desktop, without hitting Menu multiple times on the remote, simply press Command-Tab as if you were switching applications.
[robg adds: This isn't mentioned anywhere in Front Row's help, so I'd never thought to try it. Unfortunately, when you press Command-Tab, you aren't immediately switched back to your Desktop. Instead, Front Row navigates back up out of whichever screen you were in to the main menu, then closes that, complete with all the usual animations. (Command-Q does exactly the same thing.) If someone knows a real "quit Front Row *now*" shortcut, please share!]

