i have the solution... well let me explain.
u can make a chat room in the IRC, for all people, but people dont have IRC can joint the channel throught the web.. i know exist java programs that u only need to put your nick and click join, and !trick! u are in the same room than the irc guys
its easy to do that
if u want more information make me a pm in any forum xDD or msn or what u want