This session will provide an in-depth look into the use of HTML 5 WebSocket and the techniques and technologies required to build Comet applications with it. Additionally, the speakers will discuss the trade-offs between emerging de jure standards (such as HTML 5's WebSocket) and de facto standards such as the Bayeux protocol. Furthermore, the session will cover the server and network architecture that powers an event-driven web application. Attendees will be introduced to the technologies and requirements for delivering scalable, real-time Comet web applications, and, most importantly, to the pitfalls they may face in the process.