Tuxemon has a home in the freenode IRC network. We generally talk about the game, keep users updated, and work on developing Tuxemon. You can connect using web chat or any compatible IRC client. The following channels are available on chat.freenode.net:
#tuxemon: the main channel for discussion and general support.
##tuxemon: the social and off-topic channel for discussion not directly related to Tuxemon.
Wikipedia has an extensive list of IRC clients classified by platform support.
IRC logs are available here.