Now back to doing some awsome writing! We all have people to educate and entertain and great deeds to achieve!

Maria

I know some advertisers do, which is I guess why we care :)

Thanks for all

Maria

(ha, ha, I still have pretty good MozRank :))

i use http://www.opensiteexplorer.org to find my Page Authority and Domain Authority numbers. It's also run by the same people of seomoz.org

Thanks Charles for the link

Thanks for jumping in!

If you're trying to measure the rough importance/link-value of a site, I'm probably more of a fan of just raw linking root domains count (which is how we order a list like http://www.seomoz.org/top500).

And if it's traffic/visits, well... You're out of luck :-) http://www.seomoz.org/blog/tes.....-quantcast

I know, you know, we all know Google PR is not more accurate than Moz rank. Still the world we live in values PR more. Till the advertisers are biased with PR, we can't ignore it for any other rank. Sad but truth.

First off, Hank Coleman is spot on about Google only updating their toolbar PageRank scores periodically. We've seen as few as 2-3 months and as long as 18 months between updates. Of course, behind the scenes for their search index, they are constantly updating PR (Google's head of webspam told me in 2010 that they crawl + update scores for "the whole fresh web" in ~6 hours). But, the public PageRank scores are much less frequent.

MozRank is something we build at SEOmoz that imitates PR – we run a version very similar to the original (http://infolab.stanford.edu/~b.....google.htm) on our Linkscape index of the web, which re-calculates every 3-5 weeks. You can see an update calendar here - http://seomoz.zendesk.com/entr.....e-schedule - and we post about each one (e.g. our last update last week: http://www.seomoz.org/blog/58-.....update-yet).

MozRank and PageRank tend to be very well correlated when both are fresh, but that correlation gets worse over time if either/both don't update (http://www.seomoz.org/blog/moz.....driven-seo).

Basically, I'd think of MozRank as a more updated, but less spam-sensitive form of PageRank, and run on a smaller web index (we think we're about 40-60% the size of Google's main index at any given time, though growing recently).

Hope that helps!

p.s. Oh - and please do note that we think PageRank/MozRank are very small parts of Google's rankings these days (probably sub-10%, maybe sub-5% of the overall algo). If you're looking for a better metric, I'd suggest using Domain/Page Authority, which take a much broader set of metrics into consideration and are far better correlated with actual rankings in Google's search results (vs. MozRank, which is built to mimic PageRank).

Maria