Форуми / Cotonti / Development / Chat plugin - need advice

Hi there,

I want to create a new chat plugin, because I did not find a good one that I can use...
But before I go off and develop this huge monster.. (it is a lot off coding)

Are there any good chat plugins (I saw esclkm Mini-chat (Shoutbox), but It wasn't what I want)
I want a kind off Skype like app (With private chat's and chat rooms)

Options like:

• friend list with online status (with colours)
• add friends (registered users off course)
• autocleaning table (limited chat history)
• separate windows for chats (rooms/private)
• only text and smilies, nothing more

Any advice/help/coments/remarks on how to build such an app is appreciated...

By the way: I do not want : irc, flash
I want plain (mean and lean) php with Ajax in the driver seat...

If I am going to continue building this app, this will be a nice one
I have worked out some raw details and layouts and already I am making the basic setup.

greetz