You could make DCC VOICE and DCC VIDEO (DCC VOICE is already supported by kvirc if iirc). Yea I know everything this guy said has been discussed, but not since the boards got reset. I think smileys would be nice too, as suggested before, with the ability to disable (disabled by default) and the ability to "limit smilies to N per line" to stop flood attacks.

I would like to see all that implemented, although I have no idea what he means by 3d graphics.