The Folk Den - Roger McGuinn in the Folk Tradition

Roger McGuinn (yes, he used to be a Byrd) has been recording, archiving and making available on the net, folk songs, for over a decade now. You can access mp3s of over 200 songs here. They're categorized in groups like Mountain/Southern, Seafaring, Cowboy, and so on. He has also re-recorded them at better sound quality and made them available for sale in a 4 CD set. Fantastic Project, and a great resource for the folk music freaks in the crowd (um, uh, ok that's me).