I found the thread, thanks for the tip.
I still think a separate subforum would be a good idea. My thinking is that a single thread could grow quite large pretty quickly, and make it hard to search thru 50 pages (for example) to find the one or two posts from people in your local area. If there was a separate thread for each local area, one could just use the search function and go straight to the thread that applied to them.
Hopefully MF:Z will continue to grow, and helping new players who live in smaller communities to find opponents is important for continued growth IMHO.
EDIT: Dakka Dakka
has a pretty good system in place.