First you should know that you aren't allowed to post links to sites you profit off of unless you have paid mothering advertisement priveleges. So you need to edit this post and remove your link and any others you may have done, else risk getting the boot. Honest mistake, I know. I've seen other people do it as well.
There are several blogging sites that can earn you money. today.com seems to be one of the more profitable ones that I have heard of, though it may be that they are backing off on payment.
I do not blog for money though, so I don't know much about it. Is there something specific you wanted to know?
Best of luck.