The numbers here show around 15.5 million active blogs, or blogs that have been updated in the past 90 days. Hurst pointed out, and I agree, that this is a more key number. That’s why I asked Sifry for this data. It’s a very different number from the overall 70 million total blogs that Technorati ever reports tracking.

As well, the percentage of blogs that are active compared to the total number of blogs tracked by Technorati is declining, according to the data that Sifry sent. (Here’s the actual slide he sent, which I can’t shrink down without losing the data)View image