Ain't the internet grand?
Here's links to stuff I think is cool in no particular order.
www.folkways.si.edu/ Smithsonian Folkways records. You can download ANYTHING in their catalogue plus liner notes
http://www.folkways.si.edu/tools_for_teaching/introduction.aspx Folkway's educational component.
http://www.banjohangout.org/ great site for geeky banjo stuff
http://talkbass.com/ great site for geeky bass stuff
http://www.dannybarnes.com/ one of my favorite contemporary banjoists. great blog.
http://www.tonyfurtado.com/ such a great banjo player and slide guitarist
http://www.jazzguitarlessons.net/ my friend created this. some really great info here.
http://www.davidgage.com New York's premiere bass shop
http://www.annakristinwebber.com/ My close friend--a great jazz performer
http://www.mugwumps.com/ Various fiddle, banjo and mandolin camps in Massachusetts
http://www.youtube.com/thealexmallettband Youtube videos I upload, like and comment on.
www.retrofret.com Oh my god. This instrument shop is so amazing.
www.elderly.com The best online instrument store I've found. Great selection of strings, picks, etc.
http://imslp.org/ Free music scores (mostly classical)
http://www.patricksguitarrepair.com/ Does great, reasonable work on instruments in Park Slope, Brooklyn.
www.gypsygeorge.com A great songwriter, producer and composer for film and TV.