FanHome.com: Toronto Maple Leafs: Message board for fans.
HFBoards: Toronto Maple Leafs: Discussion forum with an emphasis on prospects.
TMLForum: A discussion board where Leaf fans meet to talk hockey, with a variety of topics to choose from.
Toronto Maple Leafs Fan Web: Forum focused on the team.
Yahoo Groups: Toronto Maple Leafs: List of fan clubs for the team. Some require registration.