Sunday November 18, 2007 The San Francisco Chronicle Magazine Listed the following Medical Web Sites.  In no way is the posting of these sites to be considered as a recommendation.
Kaiser Permanente   
Kaiser Permanente has developed a vast amount of health information, much of it accessible even if you're not a member of Kaiser. All Kaiser doctors have home pages full of health tips and learning tools.
Web MD
WebMD.com is a staple in the health information business, and is considered one of the better sites.
Pediatric Health Information (For Parents)
Dr.Alan Greene is a pediatrician and professor at Stamford: his Web Site is one of the most accessible for parents looking for pediatric health information.
New York Times Health
Combining health content with news the New York Times launched a health portal that combines its excellent health reporting with traditional health education content and expert opinion.
National Institute of Health
National Institute of Health allows you to search scientific literature.  Helpful if you have some scientific background to understand the details.
National Cancer Center
For cancer patients looking for cancer trials.