Not all communication can be async, for example for brainstorming or getting a complicated point across the instant feedback is very important. As an example (

Not all communication can be async, for example for brainstorming or getting a complicated point across the instant feedback is very important. As an example (and to toot my own horn), my shared whiteboard tool http://awwapp.com/ http://awwapp.com/ is often used by remote-working teams to quickly sketch something. Users could just as easily fire up a drawing program and email the picture, but having the instant feedback makes all the difference.