Medicine2.0 is

the use of a specific set of Web tools (blogs, Podcasts, tagging, search, wikis, etc) by actors in health care including
doctors,
patients, and
scientists,
using principles of open source and generation of content by users, and
the power of networks in order to
personalize health care,
collaborate, and
promote health education.
http://www.jmir.org/2008/3/e23/