I had planned to do the same with the small but emergent "Sleeper Cell" fandom. And so I waited for the Sleeper Cell communities. And I waited. And I waited. Huh, said I, could it be that there won't be a fandom? Well, there were at least two off-LJ discussion boards, so I figured maybe others were waiting like me.
So I created sleeper_cell a few weeks ago. We're up to a membership of 6 and a watch list of 7. Woohoo!
I warned you that I was going multifandom. I warned you. *sigh*