What other apps work with StudioConnect besides Garageband?
We have found that most apps that allow audio via the dock connection (the charging/syncing port on your iPad) are generally compatible with StudioConnect. Here are some apps that we find work well with StudioConnect.
Guitar & Bass: JamUp Lite, JamUp Pro, iShred Live, AmpKit, Stompbox, PocketAmp (Lite), PocketAmp
MIDI: Korg iMS-20, Bismark bs-16i, AC-7 Core, PAD Midi
Additionally, StudioConnect should work with any app that uses Core Audio, a commonly-used Apple API. Detailed information about Core Audio is available from Apple here.