The Palm Beach Palm and Cycad Society maintains an excellent list of links related to palms and cycads. See their list here.
Organizations
Palm Talk (Excellent Forum created by the IPS)
Palm Beach Palm and Cycad Society
Central Florida Palm and Cycad Society
Palm and Cycad Society of Australia
Fous de Palmiers (French Palm Society)
Botanical Gardens
Montgomery Botanical Center (Research Organization, not open the public except for specially arranged group tours)
Fairchild Tropical Botanic Garden
The Kampong, National Tropical Botanical Garden
Mounts Botanical Garden (Located in West Palm Beach)