Garasu no Kamen Forum
I am afraid I do not have the time to admin/moderate a forum of my own, but this site is now affiliated with the forum:
It's in Italian but it contains an English section which is the official support forum for "Maya no Garasu no Kamen".
I will be there from time to time and let you know about the site updates, in case you don't receive them in the mailing list!
I also strongly recommend you to visit the following forums:
Glass Mask Forum (English)
Glass no Kamen: Forum (French)
Shoujo Manga Outline (Italian)
Il Grande Sogno di Maya Fans Forum (Italian)