I agree with Shelby that music may not be the best place to start. There is too much entrenched establishment thinking in that domain by both consumers and especially content creators (although it has gotten much better in recent years). Artists are still locked into old ways and I don't believe it will be the easiest market to "attack" first.

Yes, the indie market does offer some inroads, and in time I believe that will be the place to dig in and make our mark, but I don't believe it is the best place to start in the grand scheme of things. I would tend to think a market to focus on first would be one that already has its roots in upending the tradition media/content distribution status quo. The primary ones that come to mind are podcasting/vlogging (and to a lesser extent blogging). These industries are built on the idea of creators getting their content directly in the hands of users with minimal middle man interaction. And the content creators are always looking for new and better ways to monetize their offerings.

Unlike the music industry, where there are a plethora of preconceived ideas and biases holding people back, the podcast/vlog sphere has very little of that. They want innovative distribution ideas, that is why they came into existence in the first place. They want easier/better ways to spread their "art".

I believe the largest hurdle to overcome in this market is the idea that consumers have always gotten these things "for free" and there may be some resistance to now paying for them. But the whole idea of a micropayment social media platform is that the consumers wouldn't even really feel the brunt of paying anyway since the transactions would be so small. So I don't think this will be as difficult to overcome as it initially appears.