Here is my advice, and take this however you please. 4.5 years ago I built a similar service for small businesses/brands to monitor their twitter, blog, etc. mentions and manage the conversation around them and reply to them. It was called StartPR. We thought incorrectly that small businesses and startups would pay for this service. We had maybe 50 people pay us $15/month, no one would pay for the higher plans, because they were buying radian6 or sproutsocial. Small companies don't have the volume of conversation to "see" value in something like this. Larger companies understand the value. But larger companies expect to pay MORE, and get MORE features. Distribution and sales to people in this price range are tough.

Most of the people we interviewed were using some sort of dashboard (netvibes at the time) paired with RSS feeds of the search terms they were using.