You are going to have companies that are not used to dealing with mobile technology, software development, application development, regulatory issues, security, and control, trying to scale an M2M platform on a global basis.
In hybrid form, a private cloud can include data stored on premise or off, with a private Platform-as-a-Service middleware layer managing application data and enforcing data security.
But they illustrate the vulnerability of Google's new platform, and raise the question of who's responsible for OpenSocial's security: application developers, social networking sites or Google itself?