Harmon's Peak and Fox on the Town
Santa Clara Valley Fiddler's Association
Fiddler Magazine - Home Page...they have great bumper stickers too!
FIDDLE-L Mailing List
I generally order my strings on the web; currently, my favorite cheap place to get just about any kind of fiddle strings is Concord Music
And for fiddle (and other instruments) T shirts and more excellent bumper stickers, don't miss Harmonia's Big B.
A Fiddle Fairy Tale
I'm always looking for new tunes, so I have indexes of tunes in music in standard notation, sound files, and ABC notation.. I've also included a list of lyrics sites, if you want to know the words. Otter says, Happy Fiddling!