how to create a live chat application using code igniter

[eluser]chellam[/eluser]
i would like to add the chat application for my web site .how it is ..if anyone knows please help me

[eluser]KaBaDaBrA[/eluser]
hoping someone has done this before...follow these posts

http://ellislab.com/forums/viewthread/146514/
http://ellislab.com/forums/viewthread/121313/

If you find out anything please let me know too