My main broken expectation on the new Mountain Lion social integration feature was that we can't access twitter feeds in Notification Center. I ended up realizing that Notification Center is something to the system apps to post system alerts and logs, only that. I still need the apps, even when the app is somewhat "feed oriented". Yet, with Hiss application I could put my idea to work. With growl integration, growls from Twitter app are being posted to Notification Center. This solution lacks a full integration, though. Avatars are omitted, and the click on the "Twitter" item doesn't bring us to the proper place on Twitter App. Has anyone gone thru similar problems and solutions? Thanks for sharing!