Facebook Open Graph v2 and Auth Dialog Tutorial

Facebook has recently introduced new version of opengraph and Oauto dialogs
Below links would be useful in guiding the new versions :

Open Graph :
http://developers.facebook.com/docs/opengraph/
https://developers.facebook.com/docs/beta/opengraph/tutorial/
https://developers.facebook.com/docs/beta/opengraph/opengraph-approval/

Add to timeline plugin :
https://developers.facebook.com/docs/beta/plugins/

The new activity plugin is here :
https://developers.facebook.com/docs/reference/plugins/activity2/

Auth Dialog Updated :
https://developers.facebook.com/docs/beta/authentication/

Facebook has also provided with sample apps to play around with so that we could get familiar with the open graph :
https://developers.facebook.com/docs/beta/samples/

A facebook debugger for validating meta info, its a kind of html validator :
http://developers.facebook.com/tools/debug