PHP Click Tracker - Track Ad Clicks Free: This little script claims to log what AdSense ads are being clicked on your site.
It appears to put an event handler on clicks in the AdSense DIV, then looks for the words “go to” in the status bar when something is clicked (I think anyway — I’m no JavaScript ninja…). It then redirects the request through an interstitial PHP page (there’s an ASP version too) that logs the click to a database.
It doesn't work ;-(
i bet google will not allow that.
I've read the AdSense T&C and policy statements pretty carefully and I don't see anything that says you can't do that. I'm not a lawyer and I suppose it's possible that I missed something but if its there it sure isn't obvious.