I really like the idea behind DiscLive.

This company will drive up a truck to the concert you are holding, hook into your sound board, and record the concert. Nothing special there, but the unique part is they can have CD recordings of the concert available within 5 minutes of its end. Concert-goers can leave with a professionally mastered copy of the show they just saw (they will also provide pre-concert and post-concert sales support).

I think about going to a Barenaked Ladies concert. They are really great and each one is unique. They tell stories of things that happened to them in town. They create these hilarous raps about random events that happen during the concert. They were here in Milwaukee in December. I would have loved to have left the concert with a recording of it.

Musicians make the majority of their income from performances. I think this would be an outstanding way to increase their revenue stream.