I know ppl who have made them, although none of them have released them.

although you can code an irc server into mIRC, its not recomended, mIRC is not multi threded, and depending on your connection type and the speed of your processor .. mirc as a server could only suport a limited number of clients.

Talon (sop in #mIRC on WebNet) has done the best job at useing mirc to perfectly emulate an irc server, includeing linking comands to other real servers out of everyoen i've seen. He coded an array handling addon to manage the database, which he found greatly speed up the server side processes and alowed him to handle more clients then before without greatly increaseing lag.

if you want to write an ircserver i'd recomend a compiled language such as c++

Cobra^