Poker traffic is very valuable and sometimes the prices get driven up.
If you have quality poker traffic see if you can get into the fabulous.com parking program, they have the highest click value for poker sometimes $30+ a click.
BUT a word of warning first.
I've known the guys at fabulous for a few years now, I think I knew them just before "fabulous.com" existed actually. They are very cool guys and very professional. I feel comfortable saying that they know their stuff better than almost anyone else in the industry.
The fabulous.com guys can be your best friends and will bend over backward for you if you work with them, are legitimate, don't try to sneak anything by them.
The one area where you tend to see flames is where they will shut down domainers using their ppc services. Why this happens is that unlike other ppc services who possibly don't closely monitor each and every ppc affiliate in their program, possibly overlook "minor" issues, Fabulous.com doesn't. They protect their advertisers, their partners, and ultimately the industry. They don't take shit from publishers who they even suspect of click fraud. If you ever click one of your own links chances are they will know and will cut you from the program for click fraud when they do the account audits. This is not to say that there are not times when there are genuine oddities occurring on individual names that will result in an account being locked, but I really would imagine that this would be able to be resolved with a couple emails if there is genuinely nothing questionable going on. Respect is a 2 way street though and thats what people forget, if you go yelling and screaming at someone chances are you just screwed yourself.
Hope I didn't sound like a commercial there, I just have respect for the way those guys work.
Best of luck.