Serverdome has a good little survey of some blogs about blogging and how much of the space on their blog above the fold is dedicated to advertising.
Like I commented on the post – I’d love to see them do the same thing with the 10 Ten Blogs on Technorati’s Popular list – to see how blogs that are not about blogging do it as a comparison would be interesting.
I also noted that the banner ad at the top of ProBlogger only serves ads around 50% of the time. At other times I rotate banners pointing people to different parts of this site (in actual fact we were about to move that position to 100% internal banners to give sidebar sponsors exclusive run of the site and have just done so). I guess they are some sort of a combination of internal navigation/ads.
I’d be interested to hear how much screen real estate you dedicate to ads on your blog?
See the mini study at Serverdome.org