Mercury

Minor Metal Trade Association
Benefits and promotes the interests of its international membership, comprising companies actively involved in all aspects of the international trade of minor metals in all their various forms.
Dr James B. Calvert, University of Denver
History, chemical and physical properties and other interesting information about Mercury.
Wikipedia
Huge amount of information plus discussion.
Webelements.com
Basic information on mercury.
Safe Handling of Mercury
Information form the Lawrence Livermore National laboratory
Guideline for the Safe Cleanup of Mercury Spilled in the Home
US Government recommendations (PDF)
Mercury Safety Products
Site includes lots of information on Mercury toxicity.