The Coonen has started a Google Adsense keyword value tracker website written in PHP that tells you what letters what keywords are worth the most. Check out the Top Paying Adsense Keywords site however please keep in mind it is still a work in progress and only has the following letters completed thus far: A, C, D, E, F, G, and H. Be sure to check back on the Coonen blog for updates.
I think this site will come in handy, especially if you are passing Google Adsense a keyword or hints rather then using the conventional page URL scanning method. Special thanks to Lee Odden and his toprank del.icio.us entry for pointing this new online tool out to me.
