Advertising Blogs
Not blogs making money through advertising. Not paying for text ads to promote your blog. Actual blogs from the advertising industry. Clear on the topic? Good.

Here's a NYT article on the subject.
The online edition is full of spaces where no spaces exist in URLs.

Here are the advertising blogs mentioned in the article:
Influx Insights
A Fine Kettle of Fish
URBANintelligence
Speak Up
Micro Persuasion
ANA Marketing Musings
ANA Regulatory Rumblings
adrants

None of them are very interesting unless you're in the biz.