Team Communities are like the regional forums in the nano site. There is Team Calliope, Team Clio and Team Erato. Perhaps you're new and have just been assigned to one of these teams but don't know who they are. Well, drop on down. It's still early though and you may need an invite from the group to actually be a member, except for Erato. It is still super early. At least you know the communities are there and waiting.
Team Calliope:
http://community.livejournal.com/team_calliope/ Team Clio:
http://community.livejournal.com/team_clio/ Team Erato:
http://community.livejournal.com/team_erato/