I have now sent you invites to the following communities:

raging_fists -- Monk home base
airship_lounge -- social/general discussion community
ultima_arena -- contest & challenge community
moogle_workshop -- fanwork-sharing community
ff_minigames -- random games & activities community

You can check your invites here. There are activities up already at ultima_arena and ff_minigames that you can participate in. If you're interested in taking on a mod position, check out this post. Have fun! :)