The page is here:
Unfortunately, it's only the login page, but you can get a sense of the services offered:
* Build online health profiles that belong to youHopefully, Google Health will also be integrated with Gmail.
* Download medical records from doctors and pharmacies
* Get personalized health guidance and relevant news
* Find qualified doctors and connect to time-saving services
* Share selected information with family or caregivers
(Thanks to Google Blogoscoped.)