There are quite a few people on FitDay who use FD to track carbs. If I were you, since you're interested in making contacts, I'd PM some of the recently active forum members and ask them if they'd like to start a support group:
FitDay Discussion Boards - Threads Tagged with diabetes
Personally, since this is such a critical topic, I think y'all should have your own sub forum. You may want to request that in the "Support" area.