This was cool. But while the title says "a rare look inside" I wonder how rare this really is? When something is rare or unusual many times it ends up first on a major news show where it can gain from mainstream publicity and influence. Specifically coming to mind in the US is "60 Minutes" which frequently airs never before seen or extremely rarely seen things (and interviews) and is given access because of their exclusivity and established brand. Everybody uses facebook so things like this would be of interest to a national news audience. I'd venture to say that giving gigaom access is hardly rare.

As an example:

http://www.cbsnews.com/8301-18560_162-57345302/a-rare-look-a...

And of course there was this back in January of 2012:

http://www.intelfreepress.com/news/a-peek-inside-facebooks-o...