links & articles:
Core Exercises

Triathlon Resources

• USAT- USA Triathlon
• USAT -- Mid-Atlantic Region?
• Triathlete Magazine
• Ironman
• TrainingPeaks

Races:

• CGI, Delmo Sports, CityTri, TriRock...

 Swimming

• USA Swimming
• United States Masters Swimming
• Delaware Valley Masters
• Xterra
   

Biking

• USA Cycling
• Human Zoom

Running

• USATF- USA Track & Field
• Runners World Magazine
• MapMyRun.com

General Training

• Beginner Triathlete
• TriFuel
• TriNewbies
• Running Pace Calculator
• Marathon Pace Band
• Dress the Runner
• Heart Rate Zone Calculator - CHANGE
• TrainingPeaks

Tri Friendly Local Gyms

• YMCA
• Main Line Health & Fitness 

Find a Race

• Tri-Find.com
• http://trimapper.com/
  
• Active.com
• IMAthlete.com