Here's a few sites that you might find, fun, interesting or novel!

WWW site address Description
Artistes
SWÅP Scandinavian music at its best!
Malthouse Passage Boxes, dulcimers and strange plumbing...
Les Barker's pages Great links, wonderful humor!
Information sites
Folk and Roots Great general information/contacts site.
Mr Red's fabulous website !Great general information/contacts site.
Instruments
Springers Music Pamela Wilson's site - educational, historical, second hand instruments etc.
Accordions Worldwide .
Hobgoblin Music New and second hand instruments etc.
Organisations/Agents
The Sage, Gateshead Promotors of BMus in Folk and Traditional Music
Folk South East John Smedley's site covering the SE.
Adastra Agency Agent
Stoneyport website Agent
Music
Ruf Records Anything to do with master musicians Chris Wood and Andy Cutting...
The Contemplator Great place to source the obscure!
CD Rom Irish music tutorials available on many instruments and voice; covers beginner to advanced, with a wide repertoire, exercises and notes,interview and performance by top tutors (Karen Tweed, Brian Finnegan, Laoise Kelly, Karen Casey, Brendan Power, Frank Torpey, Derek Hickey...

Feel free to email suggestions for other suitable links...