The following is a list of online support groups for anxiety, panic disorder, agoraphobia and social phobia.  Often, those who suffer from panic attacks will also be agoraphobic, socially anxious or have other anxiety issues so I thought I would include those groups too.

BP Panic - Support group for individuals suffering with panic disorder (with or without agoraphobia) and their loved ones.

Pac Connection – Online, email and chat based peer support group for anyone who suffers from panic and/or anxiety disorders.

Panic Survivor – Panic attacks and anxiety disorders blog and forum.

Social Anxiety Support Chat – A friendly environment to chat with others who suffer from social anxiety.

SG PanicCenter.net – Online support group moderated by health care professionals.  It is a well organized and very professional site with several different forum categories.  For example, “Understanding Panic and Agoraphobia”, “Mastering Your Fear in Specific Situations”, “Coping With Setbacks”, “Success Stories”, and more.