Is there a good app launcher that stays entirely in the top right system bar area, and does not need to be open in the dock to work? I'm very finicky about what's in my dock, and don't like having background utilities showing up in it.
Butler, it has a tiny memory footprint, also does a great job of itunes controlling, multiple clipboard managing and other things.. Doesn't appear in the dock.
Another thumbs up for butler - i love it, also great for remembering keystrokes, such as password logins. (I know some people will mention security, but it is not an issue for me).
LaunchBar, Quicksilver, Butler, Alfred, and (of course) Spotlight all can run without a dock icon. Some of them have an option burried in the preferences.