According to the program policy, you can not have gambling related content on a site that uses Adsense. I did a post review of a site that has Video Poker and other games. Does this mean I can not use Adsense on that blog or does it only mean if I have actual gambling stuff on my site. I took it off for now because I made more on the review than I made the whole time with Adsense for that blog but I am curious what others think. We all know that Adsense rules are not always black and white.
If you link to a site that offers online gambling you can't use adsense. Unless you are Topix.net or other large site that breaks the rules.