I find that targeting DVDs and books is hard. All DVDs have no image which totally destroys the point of eminimalls.
I do use Amazon, but I don't get paid per click like I do with Chitika. I get a ton of clicks with Amazon but barely any conversions, that's why I like Chitika - all those clicks can be converted into $$$. Oh yes, I forgot about music CDs - those are hard to target as well.
Chitika will be releasing eMiniMalls for Books, as part of eMiniMalls Verticals. So that might be a better option for you when it launches. There are a few others in the verticals, but I don't remember DVDs as one of them though.