In the Saturday, 16 Aug 2009 edition of the the Key West Keynoter (local newspaper), there is an article on the the rise in motor thefts - the gist being boaters are setting up 'neighborhood watch' type programs and looking out for each other. A good thing.
The second item is in the July 2009 issue of Yachts International, page 129 - there is a good article on security and some of the products available. For more information, drop me a line.