There is a wealth of information about depression and suicide on the internet. Here are some sites that may be particularly useful.
This site is dedicated to improving the lives of individuals and families affected by mental illness.
This site provides information on symptoms and treatment for depression.
This site provides more information on cognitive therapy. The site also maintains a listing of therapists providing cognitive therapy for a variety of psychological disorders so that you can search for a cognitive therapist near you.
This site offers information for researchers and survivors of suicide as well as information on risk factors and warning signs for suicide.