Dave Sifry, founder of Technorati, is featured in a Business Week interview.

Interesting facts:

There are 30 times more blogs online than there were 3 years ago.

80 thousand people a day start a blog.

Technorati sees 9 hundred thousand posts a day - which is 11 new posts a second.

Sifry talks about Technorati’s growing pains, current difficulties and competition.

Well first off is just the sheer amount of traffic and attention. When we put up our page about the London bombings, there were so many people, so many bloggers who were posting pictures.

They were doing news reporting essentially. You would be amazed how many people were blogging just to say “I’m O.K.” There were people here in the States and in other countries saying, “We feel for you, London.” That kind of outpouring of emotion and support is half the equation. Just keeping up with this incredible growth is a challenge.

The second half is that there were so many people who wanted to get up-to-the-minute reports from the street. What’s going on? What did people see? It’s not just about blogs. You go to Technorati today and you’re seeing pictures, you’re seeing links, you’re getting a multimedia experience.