Can any of this be used to select "Login Window..." from the user menu? So far I haven't found a way to set a command key to switch immediately to the login window... (And I haven't found anything via a search of Mac OS X Hints...)

Thanks!

It doesn't use this function, but I script the "Login Window" item this way:

tell application "System Events"
	tell process "SystemUIServer"
		tell menu bar 1
			set menuExtras to (value of attribute "AXChildren")
			tell menuExtras
				set userExtra to (first item whose (value of attribute "AXDescription") contains "user")
			end tell
			tell (userExtra)
				perform action "AXPress"
			end tell
			tell (userExtra)
				tell menu 1
					click menu item "Login Window…"
				end tell
			end tell
		end tell
	end tell
end tell

This should work if you are using 10.4.x, use English as your system language, and have the FUS menu displayed in the menu bar. It works for me, at any rate.