Yahoo! Groups: Shia Sunni Dialogue 
A place to discuss the similarities and differences between the Shia and Sunni sects, to bring both the sects together.
http://groups.yahoo.com/group/shiasunnidialogue/Ahlul Bayt List - Canada
Shia Canada mailing list.
http://groups.yahoo.com/group/ahlilbait5/
Shia Islam Yahoo Group
Articles and information about Shia Islam.
http://groups.yahoo.com/group/Shia-Islam/
ShiaChat.com
A platform to discuss various issues with the Shia community. Includes a chat room.
http://www.shiachat.com/
People of Allah Group
Online Shia Muslim discussion group whose purpose is to unite the Muslim world and conduct intellectual religious discussion.
http://groups.yahoo.com/group/Irfan-Halaqah/
