Everyone here is discussing the actual law suit, what I would like to know is exactly what kind of click fraud has been committed? For instance is it that the same IP has been repetatively clicking my ad? If so I know that other search engines (smaller ones) have the ability to prevent this and they provide me with a full list of IP addresses for each click that I am billed for. (repetitive clicks from your competitor are only charged once). Does G use this technology? Or is this something more sinister where they are artificially inflating the click throughs?
I'd love your opinions on this!