Just noticed that on some searches that g has started to track. I wonder what they will do with this info and how it maybe incorporated into their algo at a later stage:
Example:
www.google.com/url?sa=U&start=5&q=http://www.example.com&e=52
Already figured out that the start=5 is the ranking of the site on that search term
The e=52 is something else - maybe the number of Adwords adverts? Will start counting and get back.