-- JC's online stuff --
Here are some sites that I'm associated with:
Roaring Jelly A contra-dance band in the Boston area

CFO The Cambridge Folk Orchestra is a folk-dance band in the Boston area
Oivan Ilo A Finnish band in the Fitchburg area
O'Neill's The famous O'Neill Irish tune books, the first major ABC transcription projects in the late 90s, reorganized into a more useful format.
Sladka Another Boston-area folk-dance band
Slow Scottish Scottish tunes played slowly
StPatsDay Collected music for several groupls who've played for Saint Patrick's Day events over the years
Vintage 17th and 18th Century social dancing

Music for "sessions"
BIDA Boston Intergenerational Dance Assoc.
BSFC Boston Scottish Fiddle Club repertoire
CFO Cambridge Folk-Dance Orchestra
Klezmer Eastern European Jewish music