if anyone wants to join #robotics on freenode, you can get mirc
or if you are a mozilla user, chatzilla
. Opera has inbuilt support for irc.
you will have to configure your client to connect to the freenode server, by using the dns: chat.freenode.net
after that, you will have to join the channel (somehow like a discussion group, or thread, in the case of the forum) #robotics.
this is accomplished by typing /join #robotics on all irc clients or by using the GUI.