Eric Wahlforss - the programmer - has made a smooth running website called Onelinr.com. It’s a place where you can start up a “backchannel”. Eric himself calls it “ConferenceWare”. Here you can read more about the background for Onelinr. The key word is simplicity; it takes about one second to start your own backchanel and start using it. I really like the scaled down and super-user-friendly design.