Y-ME is a good general site with lots of information.
Oncolink has a lot of links to multiple cancer subjects, much more than just breast cancer.
The NABCO Homepage has faq sheets, news, national support groups, resources and information about clinical trials.
How to Surf the Web from a Survivor's Viewpoint. Much easier than the hit and miss system that I used to begin with.
John Bonine's Best Web Sites on Breast Cancer Truth in advertising, folks. John has spent an inordinate amount of time checking these out and deciding which are the best for various uses.
Breast Cancer Net is a site that gives daily summaries of news about breast cancer as well as links to many other relevant pages. It has information about research, money raising events, and stories of survivors.