The following links will connect you with sites dealing with mental health issues, including alcohol addiction:
Mental Health at about.com is a source for mental health education and resources.
Alcoholics Anonymous is a twelve-step recovery program. The site has lots of good information for those addicted to alcohol. It is also a good resource for addict's families.
Alateen is a fellowship of young Al-Anon members, usually teenagers, whose lives have been affected by someone else's drinking.