I made it when I switched from LaunchBar to Butler, because I missed the convenient way of selecting music in LaunchBar.
For example if i am writing in Word and want to play some music, this is what I have to do:
With Play: hit control-space, write the name of the music and hit return
Without Play: switch to iTunes, click on the library playlist, press alt-command-f (or click in the search field), type the name of the music, click play and switch back to Word
(Version 1.0)