I've just been playing with the winamp remote for iPhone. I downloaded it from the App Store. It's called iAmpRemote.
I personally don't like using iTunes, and prefer winamp cos its a lighter weight program and plays DivX videos

Anyway I know that there are other winamp remotes around but most seem to run in the web browser which is annoying. This one is an actual iPhone app and only cost me $4.99US.
Nice and responsive user interface, and I like the playlist search feature.
I had to install a winamp plugin first, but that was fairly easy.
Check it out:
http://www.movingapps.com.
Anyone else here a winamp fan?