A challenge...

[BigDog]

http://archives.scovetta.com/pub/BBS/dlx70bbs.zip Here's a software package (with complete source code) written in the late 1980's. To date I have yet to see ANY PHP chat package even come close to what it offered more than twenty years ago! Here is a short description and links to various other download sites and the original author's contact information: http://thebbs.org/bbsfaq/ch03.3.5.htm#3.5.02 If you can make X7 do all that DLX did then you will have accomplished something noteworthy.

Thank you

[alcazar]

It looks rather like a mailbox system or a BBS than a chat software, so there is no real challenge due to the natural differences between BBS and Chat.