>>> I dont know about FF, all the stuff I have seen is hentai, but there is a Kingdom Hearts manga
http://www.aku-tenshi.com/manga/kh.php
you will be able to download it through the IRC channel at #aku-tenshi @ irc.mircx.com.

here is a site that have the same scans, (thumbnail system)..
http://www.angelfire.com/comics/khmanga/