People in the high tech-world may know the name Heather Armstrong. In 2001, she started a blog making fun of her job and her company fired her.

Now, she doesn't need a job because so many people read her blog that she makes enough money to pay for a house and raise her children.

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Armstrong said she makes a lot of money for posting her opinion online.

Anybody can blog, but not everyone can make a living doing it.

Getting paid is a numbers game, and it's all about how many people read what you're writing about.

Blogging isn't Jacob Grier's job, but he said it is his passion. For the past four years he has turned interests, like the art of making coffee, into topics that he blogs about.

His spare time is divided into writing for three different sites -- a pastime that now pays, but doesn't quite cover the bills, he said.

"I'm not leaving my day job," Grier said.

Like other part-time bloggers, Grier covers just about any topic.

However, he said developing a large audience that could turn a hobby into a career isn't easy.

No one knows how many recreational bloggers are in cyber space, but experts said more and more are getting paid.

Traffic on their sites can draw advertisers, and advertisers bring in money. A click on a Web page view can determine how much someone gets paid.

Marty Moe, vice president of Weblogs Inc. said it is the experienced writers that captivate crowds and demand a salary. Moe said more and more the bloggers are considering themselves as journalists.

With an endless stream of blogs and a growing number of bloggers, making a living online won't come easy.

Some people sign up to blog with companies like Weblogs, while others go straight to the advertisers like Google. There is no science to who makes $10 and who makes $10,000.

The pros said the more unique your blog is, the better chance it will catch on and start making money.