Looks someone hasn't seen early news... my guess is that the servers are down because probably 343 is doing something to reach. witch they are. i also seen a video on waypoint.com that they are going to make a really cool feature that you will be able to create your own challenges for reach to complete them alone or with friends, these challenges will only be created via bungie.net or bungie app for iPhone or Smartphone. Plus with the maps and all of the things going on... i am not surprised they are shutting the servers down for a while.