Well, if the black screen means "work in progress", then it's been in progress since August 2005. I don't think Alizée's site will be coming back at this address, since the domain is owned by Laurent and Requiem Publishing, and Alizéé probably won't want a site name so closely associated with Moi... Lolita anymore.
If I had to take a guess, I'd predict that her site url will mirror those of most other Universal-signed French artists (despite rumors, I believe she's still with Universal until I hear officially otherwise):
Jérémy:
http://jeremychatelain.artistes.universalmusic.fr/
Jenifer:
http://jenifer-lepassage.artistes.universalmusic.fr/
Nolwenn:
http://nolwenn-officiel.artistes.universalmusic.fr/
So, Alizée:
http://alizeesomething.artistes.universalmusic.fr/ ???