I can't find where I read it but I remember reading a discussion, I think it was in Wired Magazine, about how the presidential candidates were using the Web and Web 2.0 technologies.  I remember a chart of the candidates and what they were using.  And one of them, Edwards I think, said something like blogs, wikis, rss, Twitter..too..much...Web 2.0 (I always imagine this with the voice of the best Captain Kirk impression).

I like Web 2.0 technologies and they can be useful in health care if applied intelligently to problems, but they can be abused.  Just like Flash was abused in the 90's, a site can have an overload of these applications and overwhelm the user.  We try to use them where appropriate to solve business problems.  One of the best examples is the Google Maps mash-up we incorporated into our find a doctor application.  It displays a map of the office locations in a physician profile.