Shambhala Forum on Meditation and Buddhism 
Active bulletin board for discussions of Buddhism.
http://forums.shambhala.com/Buddhist Parents
A forum for Western Buddhists in which to discuss parenting issues and the application of Buddha-dharma to everyday life - our own and those of our children. A place to share experiences, challenges, learnings, stories.
http://groups.yahoo.com/group/Buddhist_Parents/
Christian-Buddhist Yahoo Group
A forum primarily for Christian Buddhists who need to be in dialog with others who are like-minded.
http://groups.yahoo.com/group/christian-buddhist/
DharmaNews
Singapore-based international Buddhist discussion and news.
http://groups.yahoo.com/group/DharmaNews/
Buddhism Groups @ Yahoo
An extensive collection of forums about Buddhism.
http://dir.groups.yahoo.com/dir/Religion___Beliefs/Buddhism
