Web 2.0 Programmer's Guide to HealthCare IT

I'm writing a short compilation of essays(http://tinyurl.com/health20essays) which attempts to crystallize the currently changing HealthCare space and offers introduction to various aspects of this vertical for an information technology professional looking to familiarize himself/herself with this domain.

In this survey I wanted to get early feedback if such a book will be useful, or if you an expert in any of the area and would like to contribute part of a chapter.