free.fr mirror is added, anyway it will be faster to download this metalink + bittorrent p2p, than from standard mirrors. You can use aria2c (and its graphical interface aria2fe) or Kget to download it.
Metalink
ubuntu-9.04-desktop-amd64 (64 bits version)
ubuntu-9.04-desktop-i386 (32 bits version)
Bittorrent
ubuntu-9.04-desktop-amd64 (64 bits version)
ubuntu-9.04-desktop-i386 (32 bits version)