No, I honestly don't think anything like this is in the works. I would be surprised if it were, quite frankly. That said, do you think that iPod compatibility could help the Rev?
Some ideas for how they could work together:
*Let you play your own music while you play.
*External super massive memory card.
*Use the Rev as a Juke box w/ visualizations.
Frankly, for the most part it would be gimmicky. It should, at least, provide positive press for Nintendo, and God knows they do need that.
BlackGriffen