With free DutchPIPE software, web developers can turn sites into virtual multi-user environments. Each page becomes an abstracted environment or location where visitors and other items on the page are visualized. This status is retained as visitors move around.

The site becomes an abstracted world or universe populated with objects, which can be moved into or out of eachother and perform certain actions. There's only one world with one set of objects – if you drop something on a page, someone else can visit that page, see the object, and carry it away elsewhere. A lot of real-time interaction is possible.

DutchPIPE uses AJAX and the DOM for the browser – it works without Java, Flash, plugin or firewall adjustments. On the server, PHP is used. Why don't you take a look around and see what it implies?

http://www.dutchpipe.org/

great
i tried the beer showcase

You can imagine the practical implementations and usefulness of free virtual beer.. if there ever was a case for AJAX ;)