I know this is an old thread but for you people with Poker Portals, you will want to get listed on PokerListings.com. They're the biggest Poker Directory on the planet and very easy to work with. I have dealt with them in the past on previous ventures. It is also free to get a listing. Plus you actually get traffic from this directory along with a boost in SERPs.
Once you have an established relationship with them they will write unique content for you to post on your Poker Site.
Add your site