I'm possibly missing something, but what's NOT documented here? Aren't these plugins on Facebook's documentation page (http://developers.facebook.com/docs/beta/

I'm possibly missing something, but what's NOT documented here? Aren't these plugins on Facebook's documentation page (http://developers.facebook.com/docs/beta/plugins/ http://developers.facebook.com/docs/beta/plugins/)? On a sidenote, I HATE that a lot of tumblr blogs don't have comments sections. How do you interact with the blog owner in these cases?