adsspy alternative..

i was wondering if ther is a free alternative to adsspy where i can look up a persons adsense publishers id and find all there sites using this publisher id?

I see that this is an old post, but happened upon it while I was trying to remember the domain you're looking for. So, for all of those who don't know or forgot, like I did, the best alternative is spyonweb (kom) [can't post links]