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Yet again Google is holding the cards.
Can you blame them? If advertisers could identify which sites delivered the highest ROI, they'd bypass AdWords and make their own deals with the Webmasters of those sites.
I certainly won't violate the user agreement, but depending on the script, who the visitor is, how many times they clicked on the link and how far apart the clicks were, the TLD/IP when targeting a specific country, the actually page they clicked from, encoding, browser, etc. Not just Adsense, but some of the affiliate people might be surprised what the log file/script shows where they appear in search results/partner sites, given I have never seen a full list revealed by Google themselves.