If you want to add audial/visual communication to mIRC, I recommend you first rewrite the IRC protocol. Then we can think about a client for this new protocol.
mIRC is an IRC client. IRC is text chat. Ergo, mIRC is a conduit for text chat.
If you really want to see/hear people, use a client designed to communicate via a protocol which actually supports such features, such as the myriad instant messaging programs available today. No point turning mIRC into an AIM/MSN clone. Of course, the alternative is to just visit your friends in real life...
Unless the nature of IRC expands, mIRC ought not to. Or you'd be wiring a filament lamp to a 12V cell by way of a high-density fibre-optic cable capable of carrying thousands of volts -- for no appropriate reason.
