Yahoo Groups
Cybertron Central, Georgia Transfans, Georgia Transformers Alliance, Optimus Prime's Transformer Club, The Cybertronian Conference, Transformers Robots in Disguise, Transformers Trading Post
Axalon UnderGround Forums
Continuum of various discussion forums for all things Transformers.
Bottalk.com
General Transformers discussion board and official Beast Machines story editors forums. Hosted by Bigbot.com.
The AllSpark
Forums hosted by CybertronOnline to discuss all aspects of Transformers. Home of the Cybertronian Alliance.
Transformers at TaMbaYaN
Discuss anything about the Transformers. From Generation 1, Beast Wars up to the present reincarnations.
Transformers Universe Forum
Discussion areas for TV shows, toys, conventions, and even Japanese Transformers.