Not sure if these are what you're looking for, but a few existing options are:
-3FC offers free diet blogs, and there is a forum to share your blog title so others can connect with you
-The "General Chatter" section is for any sort of non diet-related threads
-Browse through some of the existing groups. Many have a daily thread or a check in thread for the specific group where members share much more than just their dieting day. I've found all the groups to be extremely welcoming.