Regarding looking for these lists... there is one big caveat:
SEE HERE: "Ads better trafficked than major Web sites" http://news.com.com/2100-1023-268516.html?legacy=cnet
As I traverse through some lists, I'm finding this to be true. This is one reason why alexa's data is probably better, since it focuses on the main address that people actually go to in their browser. Some of these other services which just measure raw ISP requests and these get a lot of noise.
Any suggestions from anyone would be helpful.
I know, I'm obsessed... but you would be too if your client just had mail blocked because it contained a domain name from such a well know business. I simply want to find a way to **minimize** the chances of this happening again.
Rob McEwen