One of the founders in the YC W2010 batch had a very similar idea before abandoning it for something else.<p>Your decision to build on top of Twilio makes a lot of sense.<p>There is only a limited amount of radio stations in this country. And most of them are owned by a handful of parent companies. This is a good and bad thing. Good because you can easily find the buyers. Bad because this could turn into a time consuming enterprise sales process. And this isn't something you sell on the web with a website.<p>Good luck! I'm thinking there could be tremendous data collection value in this business model if you add a few more features after you've successfully sold the MVP.
I have also written a blog post that discusses the webapp in more detail:
<a href="http://www.appsmithy.com/2011/01/22/introducing-contestfm-automated-call-in-contests/" rel="nofollow">http://www.appsmithy.com/2011/01/22/introducing-contestfm-au...</a>