Yes I see lots of gambling sites running the adsense program. Check all your backlinks and I am sure you will find at least one using some of your key phrases. My thoughts on the subject are not conclusive, but I usually leave them alone. I have a hunch these site that are making money off the program are also dragging my site into paid inclusion search engines.
As it stands right now I cannot explain how my site ended up on, Ask jeeves, Teoma, iwon and several others. But underneather when searching for my domain there is usually another site which comes up who uses ads by Google. So I speculate, me personally do not like the adsense program it encourages things I hate most scraping. But a nice adsense scraper is pretty polite and respectful when they do it. greek39