Does anyone know if there is a library for this sort of communication for web communications? I'm working on my own for a web application I'm writing, but it would be better if one already exists. (If not, I've been planning on open-sourcing mine when it's usable...)<p>Incidentally, I explained this exact concept to a few friends who I talk to about my project, except I used Pat & Oscar's! You order and they give you a number, and you go sit down. Then when your order is ready, they come to you by finding the table with your number on it. A benefit to this analogy is that you can have multiple outstanding "orders", simply by having multiple numbers on your table.<p>I've been meaning to write a post about how I plan on using this, I just haven't felt motivated. Maybe I will now!