Well I just finished learning AJAX and want to start an AJAX web application. the thing is that I don't know what kind of application I want to work on so I'm asking you guys to come up with one that will use HTML, CSS, Javascript and PHP. Nothing too big but nothing to small as well. I'm starting a small ShoutBox. I want a type of application that would be used by companies.

I have a software in mind where companies like Fast Food restaurants could install on their websites and have customers easily make orders while employees will see incoming orders live via AJAX.

I'm thinking of an application more to the likes of that program.