A lot of sites for other interests (like hunting, or snowmobiling) have regional sub boards where you can go to and say "hey want to group to to do this activity?"
Would be cool if we had this here, would help find groups and players.
I think what he's saying is have a sub-forum for each state that way you can go directly there instead of combing through the entire section looking for a specific location.
A small group of People could always set-up a sister forum that has sub-forums for each Country, State/Province, County/etc, then people can start threads by city or by group name.