Il faut que vous aillez un compte launchpad pour pouvoir commander gratuitement votre CD ubuntu 9.04 de ce site : https://shipit.ubuntu.com/
Requesting an Ubuntu CD
Ubuntu is available free of charge and we can send you a CD of the latest version (9.04 (Jaunty Jackalope)) with no extra cost, but the delivery may take up to ten weeks, so you should consider downloading the CD image if you have a fast Internet connection.
PS : enjoy it :)