It would seem their servers are offline for the time being. I've did a lookup on bungie.net, and all of their webservers are down?I can't ping bungie.net, nor can I ping 65.59.234.117, 65.59.234.118, 63.64.119.78 (the three servers to which Bungie.net refer).
Hopefully they'll be back up soon... maybe with some new information!