How many versions of ASFXX are there?
 

I know there are a lot of versions of the Love ~Destiny/refrain/since 1999~ songs, too, but I was curious if there was a count of the versions of ASFXX, since - I feel, anyway - it's probably one of the songs that's evolved the most throughout Ayu's career. The one's I'm aware of are:

A Song for xx (From the album of the same name)
A Song for xx (MILLENIUM MIX)
A song for xx (Ferry Corsten Chilled Remix)

Are there others?

A Song for XX (A BEST edition: the vocals are different from ASFXX album version)
A Song for XX ((030213 Session #2 Take) from A BALLADS album
+different remixes

and there are also different live versions like from ARENA TOUR 2002 A, MUSIC FAIR 21 (april 2003) and others.

^ Ooh, I didn't know about those, thanks! :D I'll have to look them up!

EDIT: I'm making a really bad habit of answering my own questions, aren't I?
Complete list: http://www.generasia.com/wiki/A_Song_for_XX_(song)