The Toucans Ramphastids Yahoo Group
I've found this to easily be the most useful toucan resource on the net.
It is a pretty active, and generally quite responsive group of toucan owners,
including some very experienced breeders.
National Finch and Softbill Society
NFSS is an organization dedicated to the "conservation, breeding, exhibiting and
enjoyment of finches and softbills."
The perch.net's Toucans, Toucanets, Aracaris, and Turaco Forum
The Perch.net has several sub-forums dedicated to various types of birds, including
a toucan sub-forum.