I forgot the keycode for a u with an umlaut* so I Googled. Found the answer, and also found a piece of very short fiction from Nora Ephron: "The Girl Who Fixed the Umlaut." It's good. Don't read it first, but the last sentence is FTW.
* On a Windows machine: Alt-129 for lowercase: ü, Alt-154 for uppercase: Ü. Thanks for the reminder, Pinyin Joe! And yeah, I confess: I was typing über alles again. In my own defense, at least this time it wasn't for purposes of fanboying the Dead Kennedys.