Just keep in mind however that things can happen in a chat just as they do outside. Just as the name implies, cheating can happen on a computer just as in real life.
Just read those stories of married people having affairs on-line.
When in IRC chats there's the "/me" command to do your actions.
Just type it in like this: /me your action here, and it will print out your name and the action you just did.
For a much bigger list the WBS Chat Book has a whole list compiled from various users from all over including various smileys!! If you choose you can use text editing to increase the size of your text to catch someone's attention.