I've added some code that allows you to sort the columns by forum name or gamertag name so that if you are trying to match a gamertag up to a forum user, its a little quicker. Let me know if it doesn't work or misbehaves in some way!
That will be all the additions to the page. I might try and make a more advanced page soon where it will list the user's gamerscore etc, but I want to keep the current page nice and simple, so its fast and easy to use.