The new character set, ISO-8859-15 which is also known as latin9 and in order to maximize confusion as latin0, was created to replace ISO-8859-1 (latin1) and it includes the euro character.
The Euro is mapped to AltGr-e and the cent - if it is used - is mapped to AltGr-Shift-e in X and on AltGr-c on console.
The Euro Mini HOWTO was written on a Debian system and the set up works on Debian 3.0 (Debian testing as the time of writing).