I don't know if this is the sort of thing you're looking for, but here's a list of some of my favorite cycling links:

http://www.ultracycling.com/

http://www.randonneurs.bc.ca/links/links.html

http://www.rusa.org/

http://www.audax.org.au/index.asp

http://www.audax.uk.net/index2.htm

http://www.pactour.com/

http://www.adventurecorps.com/

http://www.bikecenturies.com/