hi farhan,
nice idea bu forget about irc, as its just spam software which ruin ur machine, so i think u can gofor parachat, just make an acc and morph it to sum link and give link on site, its easy n very gud, cus it works on java applet, i dunno much about languages n stuff bu u can ask sum professional level user ov pakwheels,
belive me its cool, if u dont belive, chk www.pakmasti.org or www.desimehfil.com