For a Start-Up, Visions of Profit in Podcasting
Odeo, five-person start-up that is based in walk-up apartment in San Francisco and was co-founded by Google alumnus Noah Glass and Evan Williams, plans to introduce Web-based system that is aimed at making business of podcasting--process of creating, finding, organizing and listening to digital audio files that range from living-room ramblings to BBC newscasts; proliferation of portable iPods and other devices for storing and playing files in MP3 audio format has created mobile audience in US on whom podcasters are counting to listen to much more than downloading songs and occasional audio book; question for Odeo is whether there is any money to be made from podcasting; photo (M)