If you dont mind working with content being used by other affiliates then I suggest
Casino Blasters – They have casino game guides (I think there all by Golden Palace)
Referback – some nice flash games, a couple of versions of slots, and blackjack – Unless they have added new ones you will find them under Lucky Nugget/Gaming Club/River Belle
Partnerlogic – they do have java games but they pop up messgaes after 10 mins (collect your bonus etc..etc…) dont worry its still your link but I’m just not a fan
but hey you dont pay for the bandwidth with these games. They have games for blackjack and slots – Intercasino/VIP and potentially InterBingo
Casino365.com – they do poker articles and news and updates. There content is more editorial. Its worth using the content as they supply new every month but in my experience the only good thing about them is there content, as a scheme I would avoid it! But for everyone its different so judge for yourself
Gamblingpress.com do headlines in a javascript but it clicks through to there site so who wants to risk losing a player.
Also you can look here
http://www.freesticky.com/stickyweb/section.asp?sectionname=gambling I have not used any of the resources but just came across the site looking for something else
After all that, the more you can write the better especially for reviews. A review written by some who played at a casino/poker room etc.. for me is always better than something pre-written.
One site I know integrates a blog of his and his friends gambling ups and downs as part of his site. He does not write it for SEO but by just retelling his stories he is inadvertantly creating content with keywords. But this option is not for everyone, and the worst part is you also need to interesting
good luck with your new site!