Consumer Health Informatics and the Grid?

I ran across this article this morning. It's about a new program using Google Health in association with Medicare programs in Arizona and Utah. Conceptually, given the Medicare bent, this may be rich information for chronic disease interventions and surveillance. In terms of services, I could see decision support / alerts. Are there others?

http://www.azcentral.com/business/articles/2008/11/13/20081113biz-medicare1113.html
(edited 2008.11.18 by BAL to add link)