Here’s an interesting article found at SFGate.com:

Blogging tough way to make money – but here’s how
Ilana DeBare
Wednesday, September 12, 2007

Q:I’m thinking of starting a blog and am curious about selling advertising on it. Do bloggers make much money from ads? How would I go about selling ads on my site? I have a full-time job, so I don’t need to make a living off of this, but it would be great to bring in a few extra bucks.
-Brand-new blogger

A: From a business point of view, there are two reasons to start a blog. One is as a marketing tool to bring exposure, credibility and clientele to an existing business – for instance, using a blog about gardening to promote a local plant nursery.

The other reason – the one you’re considering – is to generate money through the blog itself. Rather than promoting a business, the blog is the business.

There certainly are some examples of blogs as successful businesses. High-profile blogs like Huffington Post and Daily Kos attract millions of readers and sell oodles of ads.

Some lesser-known blogs do well also: Steve Pavlina has a blog and Web site about personal growth called StevePavlina.com that generates more than $10,000 in ad revenue each month. And Tom Foremski publishes a blog called Silicon Valley Watcher that garners about $10,000 a month in corporate sponsorships.

But those are the exceptions. There are 103 million blogs in existence and 175,000 new ones created every day, according to Technorati, a San Francisco company that tracks blogs and offers a blog search engine.

Most of those 103 million blogs don’t even try to sell ads. And those that do accept ads – most commonly through Google’s AdSense program – typically make only a few dollars a month. click here to read more…