Eventvue provides conference organizers with web-based social networking software, designed to help attendees meet each other and network before and after the actual conferences.
Still in private beta, the company plans to make money by helping to attract additional participants to conferences, then take a cut of these additional ticket sales. It is being used by two upcoming local conferences on social networks: CommunityNext and Graphing Social Patterns.
The company (its blog here) is a part of the TechStars startup incubator, based in Boulder, Colorado. David Cohen of Techstars has more to say about the company here. It has not disclosed the amount raised.