I think it would be wonderful to be able to find another band that is performing the same music that we are performing for our UIL contest and use Skype to allow us to perform for each other. The students could interact about the quality of the performances as they would be listening for how their parts were performed and how the overall ensemble performed.
It would also be great to be able to interact with a composer. We could possibly perform a piece by a living composer and get comments about our interpretation.
Finally, we could maybe use Skype to perform for a variety of people and get their critiques of our performance; although, I'm not sure as to the quality of the Skype transmission.