Can I use 2 iPads at the same time for synchronized music making? What about with the same app? I am getting an iPad and my mate has an iPad as well. We have a bit of a band and want to know if it's possible to 'sync' 2 iPads together to use music making apps that will play at the same tempo and be on beat with each other?

Is there some way to do this or something we need to do? How can we achieve true syncing of 2 iPads for music app usage?
This is something that the app itself would have to have supportfor.  There's no support for this inherently in the iPad or in iOS.