Dawn recently introduced me to a cool little program you can download to work in iChat, called Chax.
The following are the Chax features I use most:
-One window with tabs for all open chat windows, and the person’s name in the tab changes color both when they are typing and when they have sent you a new message.
-All of the iChat windows can disappear when you click out of that application and you can return to them by clicking on the iChat icon in the dock.
-When someone sends you a message, their icon and name can flash over your iChat icon in the dock.
I found this to be helpful because when I have multiple windows open, not just in iChat, this allows me to have fewer windows in my way on my desktop.