(This does not include individual acts: they can be found by an internet search)  

Please let me know if any links don't work

Folk dancing

Friday Folk: activityexchange.com/FridayFolk/

Friendly Folk: http://www.orangecat.talktalk.net/FriendlyFolk/

Dance etiquette:
www.wvsquaredance.org/dodont.html
www.squaredance.bc.ca/articals/etique.shtml
www.iagsdc.org/wildebunch/pages/documents/etiquette.html
www.wvsquaredance.org/dodont.html
www.burrows.com/other/manners.html

Here are some folk dance videos I found on YouTube:

Wayfarers - recognise anyone?
www.youtube.com/watch?gl=GB&hl=en-GB&v=2tR-yJ6SlGc

recognise the American contra caller who's been to the UK?
www.youtube.com/watch?gl=GB&hl=en-GB&v=SH9JrL-m8cg

an advert for an American contra series featuring a caller we know here
www.youtube.com/watch?v=rvluLg49bKc

Two featuring another recognisable American contra caller
www.youtube.com/watch?v=uFX7Bq59ajk
www.youtube.com/watch?v=MiY4bThBhnE

Two versions of Erev Ba for (the international dancers)
www.youtube.com/watch?gl=GB&hl=en-GB&v=gPqrTEECRlI
www.youtube.com/watch?gl=GB&hl=en-GB&v=6gR8arOPC8w

the first of a series of instructional videos on contra dancing
www.youtube.com/watch?v=qTtEOaruqr4&NR=1

A list of ceilidh videos:
www.youtube.com/view_play_list?p=22A80E7C5E4B162C
particularly see:
www.youtube.com/watch?v=6ZThy5fJ7TU&feature=related
www.youtube.com/watch?v=0w4g_-qRnOA

some others:
www.youtube.com/watch?gl=GB&hl=en-GB&v=bA4YDBhFGts
www.youtube.com/watch?gl=GB&hl=en-GB&v=xHP2NZJSBCA
www.youtube.com/watch?gl=GB&hl=en-GB&v=1iLN5r1_6bQ
www.youtube.com/watch?gl=GB&hl=en-GB&v=ivvDaD6ofxY
www.youtube.com/watch?gl=GB&hl=en-GB&v=Zhki6IAurxg
www.youtube.com/watch?gl=GB&hl=en-GB&v=SQ64dGNeiQQ
www.youtube.com/watch?gl=GB&hl=en-GB&v=obUpJwMc1fU
www.youtube.com/watch?gl=GB&hl=en-GB&v=D8Dk21iMUNU
www.youtube.com/watch?gl=GB&hl=en-GB&v=k7EBQP3daLY
www.youtube.com/watch?gl=GB&hl=en-GB&v=gfYjK1sGAUQ
www.youtube.com/watch?gl=GB&hl=en-GB&v=BrcaUs03S1k
www.youtube.com/watch?gl=GB&hl=en-GB&v=Dc3uiNdv1Ac
 
Other folk dance websistes
www.contrafusion.co.uk/
www.orangecat.talktalk.net/PlayersClub/
warkcom.net/live/welcome.asp?id=591
www.catswhiskersband.fsnet.co.uk
www.areyoudancing.com/
www.glorishears.co.uk/
www.webfeet.org/
www.michaelbarraclough.com/
www.bandsandmusicians.co.uk/
www.entsweb.co.uk/musicians/barndance/
www.cam.ac.uk/CambUniv/Societies/round/index.htm
www.colinhume.com/
www.regencyassembly.co.uk/
www.birmingham-rscds.org.uk/
www.setandturnsingle.org.uk/
www.go.to/abarndance
www.morrisdancing.org/
www.cdss.org/index.html
www.dosado.com/
www.nonsuch-history-and-dance.org.uk/
www.ActivityExchange.com/FridayFolk
www.warkcom.net/live/cme2772.htm  

folk festivals
www.bedworth-festival.info/
www.bromsgrovefolkclub.co.uk/
www.bromyard-folk-festival.org.uk/
www.elyfolk.co.uk/
www.midfest.org.uk/mfab
www.moseleyfolk.co.uk/
www.greatalnefolk.org.uk/
www.members.lycos.co.uk/valentinefolk/
www.warwickfolkfestival.co.uk/
www.folkwhitby.co.uk/
www.cheltenhamfestivals.co.uk/frame_festindex.cfm?FEST
www.shrewsburyfolkfestival.co.uk/
www.sidmouthfolkweek.co.uk/
www.chippfolk.co.uk/
www.efestivals.co.uk/
www.lichfieldfolkfestival.co.uk
www.festivalawards.com/

others
www.seered.co.uk/top_of_folk_festival.htm
www.reariverroots.com/
www.efdss.org/
www.folkmap.co.uk/
www.folkfax.net/
www.folking.com/
www.frootsmag.com/radio/
www.gigsremembered.com/
www.wight.info/greynwhite/
www.redlionfolkclub.co.uk/
www.mudcat.org/threads.cfm
www.live365.com/stations/oneworldmusic
www.webfeet.org/map/index.html
www.en.wikipedia.org/wiki/Folk_music