Yes, Evan Williams aka Evhead, the founder of PyraLabs (known as Blogger) which he had sold to Google a while ago. He quit last year from Google and it seems like Odeo is his latest gig: "Odeo aims to enable this new distribution channel and medium by creating the best one-source solution for finding, subscribing to, and publishing audio content." Facilitating the relationship between the audio creators and listeners that is.

Read the story of it from Ev himself and the related blog if you care to see how a new cool venture is cooking.