Ask HN: Real-time Conversation Engine

Often when someone with a large following (i.e. Robert Scoble, Tim Ferriss) asks a question on Twitter/FB/G+, there is a large interesting conversation that starts. However, it's disjointed across networks and disorganized - some great signal hidden in a huge amount of noise. Also in Twitter's case, the responses don't update in real-time.

I'm thinking about building a service that lets you start a discussion, share it on all of your networks, and link to a page with real-time responses that aggregates responses across networks and would allow upvoting/downvoting to bubble the best responses to the top.

Would you be interested in a service like this, either as a follower or a conversation starter?