After hours of emailing and searching online, trying to find demographic research and usage data of online sites, I was just about ready to give up. Then, I met my new love: quantcast.com. This is such a great media resource tool! Instead of having to email each site to get statistical data on number of page views or unique impressions, this site does it all for you in pretty chart and pie graph form. It provides media minded people with information based on country, age, income, education, other websites users visit, DMA, traffic, etc. Though it does not give you prices, it will give you the size/type of ads each site have the ability to run. Love it!