DCG, hope you don't mind; I jumped the gun I guess:
www.spamassassin.net
There are a few anomalies in your code though which I left out as they looked as though AdSense might not like them, and as I plan to knock these out at one a day, I don't want my AdSense account shut down. One was a directive to tell Google AdSense to look at another site for your content (i.e. outside penpals.com), and the other was that there were a few invisible links... is this all part of the plan?