For a while I've been looking at some interesting techniques for improved state tracking for web applications. Seaside and plt scheme webserver are using continuations to improve session handling, and have a nice clean code while at it. What does this mean? Continuations are a functional goto. They allow you to capture and save the state of an application, and possibly to return to it at any time. You could think of it as a snapshot of the current state of the application. Well, not exactly, but for the current discussion this will suffice.
