Below is a list of links we have found helpful in learning and outfitting ourselves for a Triathlon, Running, Cycling and Swimming.
Training Aids
http://www.mapmyride.com
http://www.runningwarehouse.com
http://www.holabirdsports.com
http://www.active.com
http://www.myfitnesspal.com
http://www.trainingbible.com
http://www.coreperformance.com
http://home.trainingpeaks.com
http://www.endurancecorner.com
http://yscycling.com
http://www.usatriathlon.org
http://www.trinewbies.com
http://www.beginnertriathlete.com
Race Websites
http://www.capitoladventureracing.com/
http://www.tbfracing.com/
Repair and Equipment
http://www.universalcycles.com
http://www.nytro.com/index.cfm