This is very simple, from the Auctionhouse, go to the hallway that you see on your left. From the hallway entrance jump on the ledge down the hall AFTER the torch and turn on autorun at a TINY angle so that you barely move at all and you move to your right. After a few minutes, your character will keep getting deeper into the wall and see Old Ironforge, wait even longer and you can pop through the wall and FALL INSIDE Old Ironforge! really cool place, will add the video link when I have 15 posts.
EDIT: Heres the link http://video.google.com/videoplay?do...nforge&pl=true