The server is unable to service your request -- you found us in the middle of a Ubuntu release!
You may want to try using the BitTorrent files. Bittorrent clients can be found here. The mirror itself is contributing to the torrent, so this might be a great way to get Ubuntu today!
Local UMN.EDU users will want to use this link.
Release Party! this Saturday at UMN campus, EECS building.