Third Party Live chat module for .NET (same as like Facebook)

I need to integrate private 开发者_开发问答chat module in Asp.NET site.So, internal user can chat with other users. I would be appreciate, if anyone can suggest that type of modules

Thanks in Advance.

See here about rolling your own it shouldnt be too hard with the building blocks given ASP.NET Chat with WCF

You can check out http://wcfchat.codeplex.com/ for a WCF implementation of chat.