Well, I've been the self-proclaimed Nostradameous around here as of late; and while I was checking some stats, I came across an interesting chart...and thought about what I said in the Mr. Miller thread. Nostradameous Terp calls it again!
Okay, you didn't bite. Here's what I am thinking anyway.
Populus II (but please don't name it the same, of the troops will get restless ).
CB might one day go stable and release soon, after a year in beta, and JomSocial had its release a few days ago, so there are lots and lots and lots of Joomlers going community-style nowadays.
Populus was uber popular, but it is starting to show its age already.
I know what you are saying; "Terp, you can create a community with any of the templates, so what would have to be included to be considered a 'community template?' Good question. Hold that thought...