I'm sorry I can't just openly give away the technique, thats my leverage here. I am using it on a unique script i am selling, which targets adsense ads on the fly to email messages. You can check out the demo here: http://www.pramplifier.com/demo/example.php Its a disposable email script, but also a full webmail solution, gmail style. If you use it to register or subscribe on a website, when you receive email from that website, the ads are targeted to the content of that website. Very effective to make targeted adsense money without having to ever actually write an article.
For example. if you were to get an email address and register at http://www.webmasterworld.com/ right now, since theres a lot about yahoo and news on the main page, you will see ads related to yahoo and news, and also pay per click programs. Not the best case to target ads, but it clearly shows that the technique does works.