How does a blogger get "famous"?

I admit it. I'm addicted to blogs. If they ever find out how much time I spend reading blogs at work, I'll probably get fired. Seriously. I read some well-known blogs, like Pasta Queen, Dooce and Derfwad Manor, and I just wonder how a blogger gets famous. I mean, I know they have to have something to say and a unique way to say it, but what's the difference between those that click and those who just putter along without nearly enough followers. Some bloggers will post only once or twice a week, yet they are the most popular blogs on the internet. Yet some people who are fantastic writers get no attention. (I'm not talking about myself...I haven't found my blog "voice" yet.) I wonder if there's some kind of secret blog manual.

Work's still sucking. My boss couldn't be bothered to talk to the people who have to move around so I can go back to my office, so I was homeless today. I worked in my current office, but everything's packed up and it's really hard to work out of boxes. I did get some work accomplished, but less than I wanted to. (It was easier to read blogs! :-))