Depending on who you follow, it's one of the best link aggregation sites around. Care deeply about refugee rights in Myanmar? Follow a few folks and you'll gain insight into the kinds of things like-minded folks are thinking about. There is the on-Twitter conversation, too, but the best thing about the site is what people are linking to out of it.
Sure, I'm a Twitter user too, just pointing out the tendency of people to forget that there's a world outside their own, especially if they spend enough time in their own little curated space on a site structured like Twitter.