American Council for Headache Education - Support Groups
http://www.achenet.org/support/

Cluster Headaches Worldwide Support Group
http://www.clusterheadaches.com/

Headache Care Network
Information about headache treatments and prevention and a physician finder.
http://www.headachecare.com/

Headache: Hope Through Research
http://www.ninds.nih.gov/disorders/h...l_headache.htm

Headache & Migraine Information
http://www.headache.com.au/

National Headache Foundation
http://www.headaches.org/

National Headache Foundation: Support Groups
http://www.headaches.org/consumer/supportgroups.html

Ronda's Migraine - Support
http://www.migrainepage.com/help.html

World Headache Alliance
News, information and support for headache sufferers.
http://www.w-h-a.org/