Islamica Community
Online discussion forum for Muslims.
http://www.islamicaweb.com/

Islamic Forum
A moderated forum for discussion of topics of Muslim interest.
http://www.gawaher.com

Islam4all
A discussion forum on MSN; includes articles introducing Islam.
http://groups.msn.com/islam4all

Sunni Forum
A forum for discussion based upon on the four Madhhabs (Islamic schools of thought).
http://www.sunniforum.com/

Islam Forum
A discussion forum promoting Muslim unity.
http://www.islamicboard.com/

Islamic Pen Pals
A searchable database of people seeking Islamic pen pals.
http://www.jugon.com/penpals/

Talk About Islam
A collection of forums discussing Islam, and religious belief and practice.
http://www.talkaboutislam.com/

Sunniport
An Ahlusunna portal and forums.
http://www.sunniport.com/

Islam at Pakistanway
A discussion forum on Muslim belief and practise; also includes articles, news, and greeting cards.
http://islam.pakistanway.com/

Learning Islam Together
A discussion forum to help new Muslims and non-Muslims wanting to learn about Islam.
http://p092.ezboard.com/blearningislamtogether

Sisters In Islam
A discussion forum for young muslim females covering current issues, Islam and general conversation.
http://sarah.forumup.net/

Domain of Islam
A discussion forum for Muslims, covering religious topics and current affairs.
http://darulislam.info/forum/

Challenge Your Soul.com
Includes a forum, and multimedia downloads.
http://www.challengeyoursoul.com/

My Islam Web
A forum for discussion of topics of interest to Muslims and about Islam.
http://www.myislamweb.com/forum/