There may be too many authorship-related stories currently but what can we do if it's a new toy!
As of today Google is letting some (not all) Google Plus users specify yourself as a "past" or "current" contributor of any website. It's unclear yet which signal it's sending to Google but it's surely an interesting find!
So many questions, no good answers! Read more here
Update from Google:
“We’ve made a minor improvement to the Google+ profile page so that now you can specify whether you’re a past or current contributor to a given online publication. This way you can connect your Google+ profile with the content you’ve authored, even if you no longer write for a given site.”