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Thanks for the answer, but If we took pagerank out of the equation and just focus on whether linking to an image provides any type of benefit, would a site be able to rank based on a high number of backlinks to images as opposed to pages?

Hi Rightmove! This is Megan from the SEOmoz Help Team.  Unfortunately, our API doesn't provide any social data.  Sorry about that!  All the data we currently provide for social metrics is from 3rd party APIs.  Here's what we use: Facebook data is from Facebook Query Language (FQL) Google Plus and Buzz data is from Google API to Buzz. Twitter data is from Tweetmeme. I hope this helps!  If you have any other questions, feel free to send us a message to help@seomoz.org. Cheers!

Adding "noindex" to your page doesn't just keep link juice from flowing to it - it also means that it won't appear in the SERPs at all - what about your users who are actually trying to find your page? I wouldn't noindex anything unless you're sure that you don't want anyone to be able to find that page via organic search. When you're structuring your site, it's better to focus on having a structure that allows search engines to crawl and find every page (no orphan pages, no content that search engines can't crawl, no duplicate content) and that allows users (you know, the people who give you money!) to easily find content.  If you want to conserve link juice on your pages, try to make sure you don't have a ton of links on every page, but don't try to nofollow/noindex content based solely on the idea of link juice - it won't work.

I know this is an insanely old question, but as I was looking it up as well and stumbled on this page I thought I would provide some updated info in case anyone else is looking. The user agent can't be found on the page that is listed anymore. However it is on https://moz.com/help/guides/moz-procedures/what-is-rogerbot Here is how our server reported Rogerbot in its access logs (taken from May 2013). Notice that there is a difference with the crawler-[number] rogerbot/1.0 (http://www.seomoz.org/dp/rogerbot, rogerbot-crawler+pr1-crawler-02@seomoz.org rogerbot/1.0 (http://www.seomoz.org/dp/rogerbot, rogerbot-crawler+pr1-crawler-16@seomoz.org) [updated link added by admin]