That was the super awesome events view. It was killed by Facebook API changes. I was lucky enough to have a taste of it, but now it is gone. Hopefully not forever.

I also dislike the new Events View feed integration. You can no longer no longer see full Tweets without opening the browser (here's a workaround I found) nor retweet, favourite, or update your own status (=tweet). The same goes for the Facebook integration, which I disabled since I get the notifications via email to my dummy mail account.