Blues Music History
Best of the Web
The Library of Congress has digitized the materials collected by John Lomax during his 1939 journey through the South. Among the many fantastic resources here are transcriptions of both a variety of folk songs and of the field notes taken by John and Ruby Lomax.
The Mudcat Café Digital Traditional Song Database has collected the lyrics to more than 9,000 songs (with the blues well represented), all searchable from their home page.