I want to create a plugin for Graffiti CMS that automatically sends to Facebook my post when i finish to publish it. There is any way to connect to facebook with the user's username and password and post the new content to the user's wall?
I read about the .net library that microsoft released for facebook but all auth is made by poping a window to the facebook app and i don't want that.
I don't think the core Facebook supports a "ping" type model like that, at least not yet.
There are a variety Facebook applications however that will add posts from a RSS feed, however there would be a small delay since it would be polling. There may be Facebook applications that would support that type of scenario (a Graffiti plugin notifying it in real time), or you could write one.
I have created a set of Social Networking plugins for Graffiti. Right now, they support Facebook and Twitter. Source code and binaries can be found at http://graffiticmssocial.codeplex.com/. Also, there is a discussion thread about them at http://graffiticms.codeplex.com/Thread/View.aspx?ThreadId=84038.
If you decide to use them, I would appreciate any feedback you can provide, especially on the instructions for setting up Facebook to make it work - it's kind of tricky.