I've owned the site www.hotpennystocks.com since 1999. It has not been up and running since 2003 due to my primary career which does not allow me to have a business like this due to regulations.
When it was running it was making $40,000 in income per year through advertising and featured company listings. I was 18 at the time and spending 5 hrs/week running it.
Highlights of the Domain
Some sites with large mailing lists and significant traffic make up to $100,000 per company promotion. When I used to run it we were making $5,000 to $20,000 per promotion. The market right now is great for stock promotions and a blog dedicated to micro-cap or penny stocks.
Would be happy to discuss further or answer any questions.