Mailing Lists:
OmTdev
https://lists.sourceforge.net/lists/listinfo/om...
The OmegaT developers' list. This list is for more technical discussion of features and development, and is intended for OmegaT developers and other interested parties.
 
OmT-l10n
https://lists.sourceforge.net/lists/listinfo/om...
This mailing list is for localizers of OmegaT.
 

 

 
User Groups:
OmegaT user group
http://groups.yahoo.com/group/omegat
The user group serves as the main point of contact between users and the project team. Messages are public.
 

 

 
Discussion Boards:

 

 
Chat Rooms:
IRC
#omegat on freenode