A really nice IRC client for windows or *nix is X-Chat.

(I don't like mIRC either )

IRC tip: install an auto-away script...

I know IMs can do a lot these days, but "see" if I'm going to the kitchen or the toilet?!?
This requires user interaction, the user has to set his/her IM to busy or something.

I use /nick SirKitchen or /nick SirTakingADump when I'm off to do my business