On my last site update nearly all of the high street bookmakers ran there own programs via a link on there site tradedoubler used to have a few but it was a much better deal working direct with the companies they had.
In terms of poker rev share Pro you'll get the best deals from up and coming poker rooms there not always the best to deal with though stick with the big names if you have a good site and can send traffic you'll find affiliate managers are more than happy to cut you a better deal for premium listings etc.