Greg Lastowka was on On the Media (September 24, 2010) discussing issues of justice in virtual worlds such as Second Life. More about Greg Lastowka at http://www.chaihana.com/pers.html. His most recent book is Virtual Justice: The New Laws of Online Worlds. (Yale, 2010). It does not appear that the book is available online. Where's the Kindle version?
(The site for On the Media notes that the RMT - real-money trade on virtual worlds could be as much as two billion dollars. See a 2007 entry on the Virtual Economy Research Network.)