I'm just starting to try out AJAX RB, and it seems like a great solution.

However, I can't seem to choose a playlist when browsing my music. If I navigate to a playlist using my iPod Touch and select it, I'm presented with a list of the songs in that playlists. If I select a song in that list, though, nothing happens. If I select the green "+" sign, nothing happens, either. Nothing I can do seems to start the music playing.

Is there something I'm doing wrong or need to set up?

Any help is appreciated.

Thanks! 

Please navigate to the playlist in question in iTunes and check 
whether there's an exclaimation mark in front of the track you wanted 
to add / play. If that's the case, the file behind the entry in 
iTunes' track database is missing or on a network drive that is oddly 
only automatically mounted by iTunes when you doubleclick it in the 
UI, but not when you tell iTunes to do so via AppleScript.

Also, please make sure you have no modal dialogs open (f.ex. 
Preferences or Info) as iTunes will block AppleScript for as long as 
these are open.

Other than these shortcomings of iTunes itself, no other problem 
sources are known to me that could make it not respond to your actions.

Best regards, 
Felix 

If I start RB and just hit play, the playlist being played defaults to the overall Music list, which makes sense. If I want to choose another playlist, what steps should I follow?

Thanks, again. 

If you want to use choose another playlist:

1) Tap on "Library" 
2) Tap on "Playlists" 
3) Tap on the Playlist of your choice, so you can see the tracks it 
contains 
4) Tap on the track that you want playback to start at

Best regards, 
Felix