Originally Posted by Due

I know, my comment was primary targetted towards pimpdog.
As far as I KNOW you have a trademark which they gained proffits from, they also tarnished your trademark and brand by hijacking customers and delivering content that is not your own content, making the consumer belive it is your content which obviously lower the value of your brand.
Gives you a much stronger case since you can sue for not only lost income but also estimated loss from your brand value.
In your case you should include "Zango & Advertiser(s)", Zango may not be too scared of lawsuits, but I am rather sure the advertiser(s) bidding on the words will be happy to inform who helped them suggest keywords which could place the liability on Zango. Asuming the advertiser is another john doe webmaster working from home trying to earn some easy money.
PS. hit me up on ICQ if you wanna have a small chat