Yesterday I wrote about the little tech-demo Paper Rock Scissors game I prototyped in the morning. Today, I've replaced its crude AJAX polling with a comet solution, cleaned up the UI, and added a real-time chat for the players, in about two hours this afternoon. You can try it out with the other readers of the blog right now. Give it a try, if anyone else is around. Very simple. Nothing flashy. The point was to show off how comet can improve a project that needs it. The prototype yesterday had a 500ms interval updating the game state, so twice a second it would ask the server if the score changed, if the other player made a move yet, etc. This is a terrible way to make multi-user interactions! The server would quickly get bogged down by all that polling and anything other than Paper Rock Scissors would take a lot more fine-grained polling than 500ms, increasing the load a lot. The solution, in HTTP land, is that we replace several polls per second with a single poll th...