Hmm, is sendmessage functional in LSLUA? If so, "we" (as in, anyone who understands lua enough to do it-not me ;)) could write a universal bang system for media player/winamp/itunes/etc....
Example: "!player_next (str)" where str would be MP,itunes, winamp, and so on... universal support for any music player would be a click away. ;)
edit- this could even be upgraded, easily, supporting any player which we could obtain sendmessage data from.
Now, I know it'd have to call a completely different chunk of information from a table of some sort for each player, in order to do this, but it should be possible.
(Actually, something this big would probably be best coded as a seperate lua file)