You ever want a way to determine the number of supplemental results a particular site may have? In the past, you did a site command and sifted through the available pages to get an idea on that number. Now, Google appears to allow you to see those results by entering in the syntax [site:www.domain.com ***].
So for example, this site has 806 supplemental pages in the Google Supplemental index. How do I know? I search at Google on site:www.seroundtable.com/ ***.
But what about check each and every Google data center for supplemental results? There is a tool at oy-oy.eu that goes through each data center at Google, plugs in this operator and returns the number of supplemental results.
Further discussion at SEOMoz.org and Cre8asite Forums.
