Google authorship is always confined to a webpage and only works for one link in a series of links - and always for the topmost link.
I.e. if one asks a question here with authorship info added to the post and then someone answers the question, who should be the "author" for that topic? The "ignorant" one who is asking or the "learned" one who answers?
Otherwise we do have authorship (and other, rich snippets) implemented on many of our site but only in the CMS. Like here you can see