codemastr, you lack imagination..
For the picture Idea, it could be possible by having "some_code" at the end of the "name".
is $chr(1)
What would happen then is the person doing the /whois would send the person a DCC style notice, a connection would be initiated, the picture download, and then displayed.
The "code" could include the size of the picture, so while mIRC is waiting for the file to download, it just puts a dummy pic up.
The picture would of course be optional, and for any IRC client that doesn't support this option, it degrades well enough.. They'll just see something like "65465165" after someone's name.. That's not really that big of a deal, is it?
A script could be created to do this, but it'd have to display the whois info and pic in a dialog or picture window.