Gregg Brockway has sold one travel-related company he co-founded, Hotwire, to IAC's Expedia. Will he do it again with Tripit? Possibly, given that Tripit's services could enhance the book businesses of the major online travel agents. "We complement all those online points of sales," said Gregg, in this recent interview with me at the University Club in San Francisco.

In this interview, Gregg gives me an update on Tripit, the three-year-old startup he co-founded, which helps busy travelers organize their tickets and schedules. Watch and listen to Gregg explain how Tripit makes money - advertising, premium subscription services and partnerships.