Today.com is set up very much like WordPress, so if you've ever used WP, then you're already set to go with Today. There are tons of categories that you can choose from. Just click here to get started and wait for approval.
Another place that I really like is PayPerPost. You can click here to get started with them.
These are both companies that I have written for and been paid by. There are NO fees, ever.
Also, don't forget to check out Ping-o-Matic! if you already have a blog, just to make sure that your blogs are getting submitted to all of the major search engines.