• Undersea and Hyperbaric Medical Society , the society of diving scientists and physicians
• DAN, the Divers Alert Network,
• Docs Diving Medicine, an interesting site from the Univ. of Washington
• DCIEM, Canada's environmental medicine institute
• Best Publishing Company, for a catalog of diving related books
• Ireland National Diving School, all about diving in Ireland

You can also search YAHOO, LYCOS, or GOOGLE using the keywords: DIVING MEDICINE to find other diving medicine sites.