Several links of a medical nature on the use of Web 2.0 and Second Life.
Click here for post on uses of Web 2.0 and Medicine that was originally a Second Life event
Click here for the blog record of a medical simulation conducted in Second Life in August of '07. Be sure to read the comments for learner feedback on the experience.
Click here for more on Web 2.0 and Medicine with very useful collection of information including references to blogs, youtube videos, podcasts as well as comments and discussion via additional hyperlinks and posted comments.