I just released the second milestone of Spring Social Google which adds Google Drive integration, as well as a few improvements and bug fixes: https://github.com/GabiAxel/spring-social-google
The example application is running here: http://googleapis.cloudfoundry.com
In the next milestone I would like to add the remaining Google Drive functionality and keep adding more API bindings.
Your feedback is appreciated. What other API bindings would you like to see in future releases?