This is a helpful hint if you’re running 10.4.11 like I am and would like to try the new iPhone app called Remote.
Step 1: update iTunes to 7.7.
Step 2: Go to your System Preference > Sharing and make sure Remote Apple Events is checked in the Services tab. Also check iTunes Music Sharing on the Firewall tab too just for good measure. You can leave the firewall itself off.
Your iPhone should show up in the left column in iTunes under “Devices”. It will automatically ask you for the 4 digit passcode as shown on your iPhone. Fill that in and you’re done.