Just a quick post:
Google health is a service which allows users to load their medical data (as well as people they would like to care of) into google records. You can create a new account or sign in with your gmail user account. It allows you to upload your medical data, get health related suggestions, connect to different health service providers and several other medical services most of which are provided by third party vendors and come at a price. There is a video you could take a look at over here. It also contains API documentation for developers who would like to build over the Google data model for based on google health data and services.
The below is a nice presentation shared by Bess Ho and team deveoping a mobile application called Chief Medical Officer based on google health data services for the Android/Iphone using titanium for development (Atleast the design documents mention it that way in the presentation).