As has been rumored for some time, Microsoft Corporation has jumped into the PHR arena, with HealthVault, which seeks to consolodate needed health information for patients. It looks to have a facebook-like integration quality, with developers able to add applications that users can subscribe to.

Microsoft Introduces No-Cost, Online Personal Health Record - iHealthBeat

More diversity in the field is welcome. The PCHIT project is really about understanding things at the health system level, to allow projects like this to flourish - whatever it takes to empower patients in their care.