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:

We are happy to announce an important enhancement to our recently launched OpenID endpoint. Google now supports the “Hybrid Protocol“, combining OpenID [...]