patent on how google can use historical data to figure out how a site is ranking:
– whether there was a sharp uptake in links and whether there is associated phenomena to back this up.
– where it ranked previously, esp for seasonal terms
– when it appeared in the index (to find out if it has been page jacked)
– query analysis to see which links get clicked on
not sure quite how soon this will come into effect but could be a useful way to get round many of the techniques that seo’s are currently using.