First the bad news: AVIC Feeds update for iPhone is now available in the App Store - says it now supports iPhone 4 and iOS 4; but I just updated it on my iPhone 4 and the app *still* crashes when I try to save a pin location or just hit "List" within the app!! Very frustrating.
Now the good news (for iPhone owners) - iOS 5 is supposed to include an update to enable support for AVRCP 1.3 BT devices - which the is the AVRCP version our 920BTs are equipped with! So, after iOS 5 is released (probably in the fall), you should be able to stream Pandora; Slacker; etc. via BT and see artist, album, and track info onscreen on the 920! See this post: http://www.macrumors.com/2011/06/09/ios-5-streams-trackartist-information-to-bluetooth-audio-devices/