After getting facebook API and twitter API both to work - i'm digging into the google health API/Google oAuth protocol. Collection of notes below...
types of oAuth
http://blog.apigee.com/detail/oauth_differences/
http://code.google.com/apis/health/
getting started: http://code.google.com/apis/health/getting_started.html
you'll eventually need to start using H9:
https://h9.google.com/ - the sandbox environment.
more on google oAuth
http://code.google.com/apis/gdata/articles/oauth.html
oAuth Playground (FANTASTIC!!!)
http://googlecodesamples.com/oauth_playground/
possible plug and play solution...
http://www.dotnetopenauth.net/
more to come as i figure this out...
-bp