HuskyPup - 8:07 pm on May 9, 2011 (gmt 0)

I think they need to re-run it fairly often because new sites are constantly being created

Yep, I'm about 10% of the way through constructing and launching a new site and many of the pages have gone straight into the new SERPS in excellent positions within a few days of being uploaded, even widget images are doing well.