I agree and have asked for this before.
There are so many apps available for any of the above hardware choices, especially if loaded with 4.0, or above. And I seem to find new ones, almost everyday, pointed directly at musicians, from pro to entry-level!

I really believe it would turn out to be the most active forum, especially if we could broaden the scope, to include all the portable hardware on the horizon, with the potential of making Peter and stockholders very rich men. Certainly on MY wishlist is a REAL BAND clone with full midi capability...syncing with both PC Windows users and Mac users, which should be growing by leaps and bounds.