Branch, a new social startup, just came out of beta today. Promising "A new way to talk to each other," the startup is incubated by Obvious Corporation, the "mini-accelerator" from Twitter's Biz Stone, Ev Williams and Jason Goldman. Here's an example of what they have in mind.
One of the things Twitter doesn't do very well is foster actual conversations between people. One could say that this is, in fact, the great shortcoming of our time on the internet: comment systems, Facebook, Google Plus, all fall short. Branch looks like it's trying to tackle that problem. More power to 'em.