Taj Mahal Online This is Taj's official site run by him and a few friends. You can talk directly to him via e-mail. (I've done it.)

Reverend Gary Davis website, with some great interviews and more.

Tonnes of blues and fingerpicking tabs and lyrics by the masters here. You'll need a copy (free) of Guitar Pro Tab Reader for these tabs.

Some Josh White info.

Hopefully I'll think of some others to add as well.