I think he means have the server send u an image or a link to an image and have it display in the channel.
I think it would have to be a thing added to IRC rather than mirc. Or mirc just be prepeared to lookup and display an image listed in the channel topic or something.
Im against it, personally, and if it was added I would hope it could be switched off, and I would never switch it on if i could avoid it.
* but im not saying dont add it, then again considering there was that JPG buffer overrun exploite detected a while ago, maybe it wouldnt be worth adding?!?!?!