You can find a wide variety of support groups on the internet.  The following are just a small number of sites that offer chat and forums for support groups.

About: Depression  Bulletin Board
Bipolar Survivor

DBSA Message Boards  DBSA forum

Depression Forums
Mixed Nuts Depression Forum
Social Phobics Anonymous Telephone support for people with social anxiety
Support 4 Hope Various chat and support forums
Teen Moods Teen Depression Support Community Depression & Mood Disorder Support
Yahoo Groups - Bipolar Disorders  Hundreds of listed groups to choose from
Yahoo Groups - Depressive Disorders  Hundreds of listed groups to choose from

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Disclaimer:  The links provided are not meant to be an endorsement or recommendation of any treatment or advice to be found on those sites.  We are not responsible for any content or information to be found on any sites outside of the domain.