love NAMI family support groups. Also love their "Family to Family" course - really great for leearning about all the issues related to MI.
If you are dealing with bipolar, I strongly recommend the listserv run by BPSO.org. Lots of email, so use a separate account, but the ability to hear so many different ways BP presents and the issues in relationships with a BPSO -- well it's a uniquely valuable resource.