OMG! This is so useful and non-obvious if you LOVE Google docs and want to be able to comment with keyboard shortcuts. Mac OS X defaults to CMD-OPT-M for minimize all windows, so if you define this app shortcut, you can then use CMD-OPT-M for Google docs! Reference: http://www.jacobsingh.name/content/disabling-or-changing-mac-keyboard-shortcuts-menu-minimize-all
