Maybe to start you can get a sticky on the Health forum here:
http://allnurses.com/forums/f240/
There are a lot of nurses dealing with various issues from depression, diabetes, hypertension, back problems, etc. etc. The above forum may be a good start. You may "advertise" in the general section with a post that says. "All nurses with ADD" and in the body of the post say "please follow this link to the Health forum.........." or something like that. Just a suggestion. I've found that while initially there may be a lot of gung ho interest in the topic it usually fads over time and is dominated by just a few.