What would it mean to have a stripped down social network that was also secure? It would look like Tuenti, the social network out of Spain. To give an example of how seriously they take security, the Tuenti API is closed because "of our efforts to be the most private, secure social network on the market..." But if you play nice, they can make exceptions for commercial apps and games they have tested.
Google is making it even easier for developers wishing to implement OpenID with the OAuth. Google has announced that developers can now utilize a "Hybrid Protocol" that combines the OpenID federated login with the OAuth authorization process. The new OpenID OAuth extension makes it easier for developers to implement OAuth through initial authentication using OpenID. According to Yariv Adan on the Google Data APIs Blog: