Christian Gamer's Alliance can probably help set up a forum thread, Teamspeak 3 channels, and more. I run some of the community servers, for CGA groups. (you play on our minecraft server :p )
If you want to apply to be a Christian Gamer's Alliance Guild, register by following the instructions at: http://www.cgalliance.org/forums/showthread.php?t=43571
I'll support you, on the minecraft server, by giving your tribe a tag, if you get recognized by CGA.
There are also a number of existing clans that can use leadership (see God's Frozen Chozen as an example), especially in minecraft.