Programming a multiplayer game with a PhP/MySQL server, and JavaScript/jQuery clients

Here is the situation. I would like to develop a game based on content delivered by MediaWiki. MediaWiki i开发者_运维技巧s PhP based and has MySQL as database. So far, I did the client side animations using JavaScript and jQuery.

The game doesn't have to be strictly real-time. I simply want to be notified when the person I am playing against makes a move, within a second or two.

Do you have suggestions about suitable approaches I might want to consider?

If you are into new programming approaches, you also may be interested in node.js and the whole WebSockets thing. This video on YouTube gives you an idea of what you can do with WebSockets (also check out the related ones).