Keith Pollard (of Intuition Communications, Ltd - "The company owns and operates a network of web sites that provide advice and information for patients in the UK and overseas who are seeking treatment and healthcare services.") provides policy oriented medical tourism discussion on his weblog Health Tourism.
Recent posts discuss Korea's potential as a destination, dental tourism in Budapest, and transparency and fraud in health tourism. Infrequent posts since 2006. Does look like a helpful resource.