SocialBox
So Google's Hangouts may be a killer app: http://gadgetwise.blogs.nytimes.com/2011/07/05/is-googles-hangouts-its-killer-app/. The article – and indeed Hangouts itself – emphasize what people want in social tech: immediate, human connectivity.
This got me thinking, which is not unusual. Hangouts, Skype, Facebook chat, all point me towards what I believe could be the future social "killer app;" indeed a service so needed I expect multiple companies to try and make it. I'll call it The SocialBox.