I've got this site, which is essentially a content hub. The homepage etc... aren't very important. Everyday, tens of thousands of blogs get posted, across a wide range of topics and different languages. It's full of unique, in depth personal content (with images). So the site ranks across tens of thousands of keywords at least. Was wondering how much you would be willing to pay a month for adspace? I would place each of your ads on the page on which the posts are placed. Either within the post, below it or on the side of the page. This means your ad would be visible on every single page on the site. And for every single impression on that site. Impression range from about 13k/week to 30k+/week.