CrossFit.com  - Where it all began!

CrossFit in the UK

CrossFit Central Scotland - CrossFit in Motherwell with Davie

CrossFit Manchester  - CrossFit in Manchester with Karl and Mark

CrossFit Derby - CrossFit in Derby with Mark

CrossFit Newcastle - CrossFit in Newcastle with Ian

CrossFit West Sussex - CrossFit on the South Coast with Miles

CrossFit Bristol - CrossFit in Bristol with Paul

CrossFit London  - CrossFit in London with Andrew

CrossFit Friends in the US

BrandX Martial Arts  - CrossFit and Martial arts with Jeff and Mikki Martin and their crew in Ramona, CA

Brand X is also home to CrossFit Kids

Resources

The CrossFit Journal  - Real training info, really cheap

The Performance Menu  - Nutrition is the other half of the equation

The CrossFit FAQ  - Got a CF question, check here first

CrossFit Videos  - World Class exercise demonstrations and inspirational WOD videos