While adding realtime functionality to ASP.NET applications has often seemed difficult due to the connection limitations of the IIS platform, it can actually be achieved fairly easily by offloading this component to third party services like Pusher. In this series of posts, I'll get you started with this exciting technology through a number of hands-on tutorials. In the first one we'll build a simple e-commerce application that displays realtime stock levels to the customers. One of the probl...