American Cancer Society All About Colon and Rectum Cancer  -Various resources for colon and recal cancer including detailed guides, overviews and coping issues.

National Cancer Institute Colon and Rectal Cancer  -Very complete information including diagnosis, treamtment, prevention and genetics.

Colon Cancer Alliance  

Colon Cancer Network  

Oncology Channel Colorectal Cancer   - Videos and illustrations make this a must see website for colorectal cancer.