It's pretty clear that "AuthorRank" is going to be a big thing for SEO.
Although the main principles seem to be pretty straightforward (http://www.seomoz.org/blog/authorship-google-plus-link-building) what I'm less clear about is how we can start to think about author influence as a measurable metric.
Webmaster tools gives us Author Stats as an impact on the site's impressions/CTR, but how do we measure the influence of an individual author? Are those factors even defined?
Will we get to a stage where authors can be given a Klout-like score for Google Authorship? If not that, how will it look?
This will be a HUGE question to solve for future content development strategies, and is something I'm thinking a lot about right now.
Best, Matt.