Blogads is the biggest ad company dedicated to blogs. As such, they tend to have a lot of data about bloggers and blog readers. How do they get that? Their annual blog reader survey, which is now underway.
If you have a moment, please go take the survey. A big thing hindering the blog ad marketplace is advertiser confidence. With more data, advertisers can be more confident is augmenting their campaign with blogs as a part. That plays bloggers, and paid bloggers means more great content.