One Observation With the Showcase
While playing the showcase sample, I notice a scenario lead to an exception. After a Facebook connection is setup, I remove the Spring Showcase from my Facebook apps page. While I access the URL /spring-social-showcase/connect/facebook and have this message "Spring Social Showcase is connected to your Facebook account. Click the button if you wish to disconnect", any Facebook communication activities will lead to an exception. It is the same if try to post a feed after the publishing right is revoked. I don't know Spring Social good enough to solve this problem yet.