Cardiology fellows at the Cleveland Clinic have established www.askdrwiki.com with a growing catalog of cardiology information for physicians and other medical professionals. The wiki includes videos, images and text with a growing group of screened participants.  This is a good example use of Web 2.0 technology in health care using techniques to control who contributes but allowing collaboration among professionals as a way of building a knowledge base. They have been cited by  the journal Nature.

Technorati: Web 2.0