Cision compiles list of top 100 blogs in PR, social media, marketing, and SEO

How many are you reading? And why not?

1. Social Media Examiner
2. ignite Social Media
3. Mashable
4. Search Engine Land
5. SEOmoz Blog

One question: When is a blog considered a website, and vice versa? For instance, Mashable calls itself a news site, not a blog.

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