Mayo Clinic - Good for mainstream questions, reliable but limited resources on alternative medicine
WebMD - News Articles, presents cutting edge possibilities, but unclear what you should do about it. Be careful with advertisements. They are linked to key words in the articles. Their presence does NOT indicate any endorsement but they might lure the curious toward unsubstantiated product use.
TransWeb - announcements, testimonials, reports, press releases, policy changes, an organ-donation FAQ, newsgroup postings, and other information for medical
professionals, patients, and family members.