I always enjoy Kevin Rose's Foundation interviews with founders and successful entrepreneurs. They were actually the inspiration behind the interview series I started for The Advertising Federation with the help and advice of Ken Friberg.
This interview with Ev Williams was great for two reasons. The first was how open and honest he was about the early days of Blogger, Twitter and the challenges he faced working on big ideas no one had done before. The second was the rational behind his latest start-up Medium. In this era of socially driven content on the web I truly believe collaborative blogging is an idea who's time has come.