The thing that we found performing the process manually is that some of the best content comes form people with a couple followers, so there's not enough data (retweets, interaction) to determine what content is quality. Our proposed solution to that now is just to show everybody everything that matches a certain keyword, similar to the hackernews or reddit /new feed.
Interestingly enough there are some people doing this already, just without a tool. So they'll watch the networks all day and gather links into google docs, fb pages, twitter, etc. It works really well, but it's a one-man team, and it's a very painstaking manual process. We want to let more people contribute to that same process, and eventually (hopefully) entirely crowdsource breaking news.