Kingdom Hearts Palace

Forum for fangirls to talk about the game, plus a little bit of disney and Final Fantasy. Also has games and files for download.
http://kgdmheartsgirlz.proboards16.com/index.cgi

Kingdom Hearts II News Club

Forums discussing theories about KH2, with information archives and a chatroom.
http://www.freewebs.com/kh2info/index.htm

KH Role Playing

A role-playing message board where you select a character, and play along.
http://rikku399.proboards26.com

Kingdom Hearts Infinity

A forum with pictures, help, walkthroughs, and media downloads.
http://s3.invisionfree.com/khinfinity

Kingdom Hearts 2 Board

A message board where members can post information and theories about the sequels.
http://kh2board.proboards22.com/

Destiny Islands

A clique for those who believe in the legend of the Paopu Fruit. Share the paopu with the one you love.
http://paopu.final-dreams.net/

RikusGirl

A forum for discussion between Riku fans, as well as for submitting fanart and fanfiction.
http://www.s7.invisionfree.com/RikusGirl/index.php

Square-Enix MSN Group

An MSN group with a community of KH fans, including chatrooms, forums, and galleries.
http://groups.msn.com/SQUARE-ENIX