I had a chance to talk with Zadi Diaz and Steve Woolf from EpicFU. I have long been a fan. They are two of the smartest people creating online shows out there. I love their show. They know what it means to create a social experience around their content not just create great video. With their use of a NING social network, they now know about their participants (can't just call them an 'audience' as they are too engaged). that has always been the pitfall of many an online show for marketers who want to know who they are reaching.
Marketers should jump on board their embedded sponsorships. Check out the recent show aith Arianna Huffington (nice house!)