I agree with Randy, the “casino guide” model is the best one to follow because if you have a surfer coming to your site, you are offeing a variety of casinos that appeal to different types of players rather than just one casino program.
If you want an idea of how to design a good site, here are two of the biggest “super affiliates” in the gambling biz:
Both of these guys make TONS of money and they have been doing it for years.
Notice that the sites are DIFFERENT.
Do NOT copy either site design, that is stealing!
I just want to give you examples of two sites that are VERY successful so that you can get some idea about how to design your own “casino guide” site.