Logitech recently released an iOS app called Logitech Squeezebox Controller. It lets you control your Squeezebox player. It works really well.
Find it in the app store.
Yes it does work great. I just bought this for our kitchen and the second day I had it I called my wife when she got home from work. I told her to sit down at the kitchen table and relax. Then I turned on her favorite station from my work and told her to relax until I got home. Score!