Weird assymetry, you can control an iTunes from an iOS device, but not from any Mac OS X computer... Here's how to fix that...
lion - How can I control iTunes from another Mac? - Ask Different
I've got a Mac Mini running Lion that stores my iTunes library. It's hooked up to my receiver and speaker system, so it's the preferred machine for playing tunes from. I'd like to be able to control iTunes from my MacBook Pro, also running Lion, connected to the same WiFi network
iTunes Remote Control does exactly what I am looking for, but - call me superficial if you like - it doesn't blend in on my desktop. I would ideally like something a little OSXier,
TunesRemote SE helps you remote control your DACP-compatible media player from another computer running Java. DACP compatible media players