To encourage 3rd party application development. It's annoying to see someones login id is 39423 because you then have to open up a browser, navigate to dplogin, and type in the id to see who they are. Instead a program could be written where you enter the id and it automatically fetches and displays that information. I did this in Java, however all it did was read in html and parse out anything that didn't apply. XML would make it ten times easier to do something like this.