I dont know what network you are on, but the ones im on the users often only set them self away, no need to change nick for it.. and the most users have a away script of some type, that means that they often sends a notice to the person that he/she are just away, but i shouldent nag to much about this, my sheme coloring the away nick as the user want it to.. default away people is blue.. smile but as said befor it using /who #channel . and this cosing mirc to lag from time to time, and i would hate to see a clean mirc lag like that. so i dont think it will be included in mirc..

if ($me != tired) { return } | else { echo -a Get a pot of coffee now $+($me,.) }