PusherApp – realtime push notifications for your web application

For me, one of the most exciting technologies to come out of the HTML 5 spec is WebSockets. A new way to “listen” for incoming messages and events occurring from the server side and pushing out the information to web browsers in realtime. Traditionally, developers have to regularly poll for information – which puts both stress on the client browser, and can be out of sync with the remote server. WebSockets aim to change all of that.