Good sample of asynchronous comment system for ASP.NET MVC, JSON and JQuery

Can anyone jot down a complete sample for creating an asynchronou开发者_高级运维s comment mechanism like this, but focusing on ASP.NET MVC?

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There is the Encouraged Commentary system

Explained: http://donttrustthisguy.com/2009/01/04/encouraged-commentary/

Code: http://github.com/jimjeffers/encouraged-commentary