As an experiment, I've developed a basic Xojo-based Web chat application. My goal was to see how quickly and easily this can be done in Xojo using the current Web framework - and it didn't take very long at all.
Now I'm hoping to see whether or not it can handle load. If you're interested in helping to test it, please visit: http://chat.timdietrich.me
Please note that the app isn't running over https (yet).