http://www.onrpg.com/boards/free-mmorpg-requests/
Use it for any kind of MMO game request, don't be deceived by the MMORPG title.
And for GunZ...
http://ijji.com/
Is the site for the games, and
http://gunz.ijji.com/
North American GunZ site (still not released in Open Beta yet.)
