/list Lists all current irc channels, number
of users, and topic.
/names Shows the nicknames of all users on
each channel.
/join <channel> Join the named channel. All
non-commands you type will now go to
everyone on that channel.
/msg <nick> Sends a private message to the
specified person. Only the specified
nickname will see this message.
/nick Change your nickname
/quit Exits irc.
/help <topic> Gets help on all IRCII commands.
/who <channel> Shows who is on a given channel,
including nickname, user name and host,
and realname.
/whois <nick> Shows the "true" indentity of someone
Use this often to make sure you know
who you are talking to, because
nicknames are NOT owned so any
number of people could use a nickname.
These commands should get you started on irc. Use the /HELP command to find out more about things on irc, or ask question of people... most would be happy to help you out.