any good team-chat websites?

are there any good team-chat websites, preferably python, ideally cherrypy trac?

this identical , nonetheless few primary differences:

1) i unequivocally many wish horde server.

2) i don't caring smileys enclosed client.

3) i'd twin options users:

a) ability horde private irc discuss trac page (or couple such page),

b) grant remote clients also interact.