Messages were moved under Activity and they are listed as discussions. Sub was renamed to Subcafe. The interface got cleaned up and presence indicators removed. One more thing... Subcafe is on Play Store (play.google.com/st...).

Nice, I'm on one screenshot too ! Appreciate it ! I'm also on Windows Phone 8.1... So can't use it unfortunately :/

I'm honoured to be in the screenshot. 5 stars!