There are many good sites on the internet to research mood disorders.  The following are a small selection of sites that may be helpful.

About Bipolar Disorder
About Depression
Bipolar (Manic-Depressive) Disorder
Bipolar Home
Child and Adolescent Bipolar Foundation
Depression and Bipolar Support Alliance
Depression and Related Affective Disorders Association
Depression Depot
Dr. Ivan's Depression Central - Depression Resource Center
Learn About Depression 
Liberty County Mood Disorders Support Group 
Mental Health Channel - Bipolar Disorder
Mental Help Net
MH Connections
NAMI Georgia
National Alliance for the Mentally Ill
National Foundation For Depressive Illness, Inc.
National Institute of Mental Health - For the public
NIMH - Bipolar Disorder
Pendulum Resources
Psych Central 
Undoing Depression
Walkers in Darkness, Inc.
Wing of Madness

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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.