11/17/2011 01:30 pm ET | Updated Jan 17, 2012

CEO of Sonar, Brett Martin, Speaks About the Social Landscape

Zev and I have been trying to sit down with Brett for a few months now. It's been difficult because Bret is just an incredibly busy guy. He is founder/CEO of as well as a Director at AppFund. So needless to say I was very excited to finally sit down with Brett and talk about the beginnings of Sonar.

Essentially, Sonar is a location based service (LBS) but it's not your run of the mill LBS. The service is designed to facilitate warm introductions through someone you already know. And Sonar uses Twitter, Foursquare, Facebook and LinkedIn to build these relationship connections.

So let's listen in to why Brett think this is a necessary service.