Currently we can do it using MIDI.
The next update to my BeatBuddy Wireless MIDI Controller will include embedded support for the iRig Blueboard.
One of the footswitches will have the Single-Tap Next-Part function preconfigured.
It has an unexpected side effect, however: If you step on it when it is stopped, the BeatBuddy will play the Intro and go straight to part 2! Isn’t it fun? 