There are getting more and more websites offering bloggers cash for posting blog ads in their blogs. If you are looking for an extra source of revenue from your blog besides AdSense and affiliate commission, you may try posting blog ads. Below are a list of websites or companies that pay bloggers for posting blog ads or writing content in blog:
Payperpost.com - The site will pay you for writing content about websites, products or services of advertisers with a link to your advertisers sites. They pay via Paypal and payout is 30 days after your post.
Blogging Ads - The site pay $5.00 for adding a pre-written sales message to your blog.
Blogitive - You make money by writing a short article about the news release of companies in your blog.
BuzzByBlog - You wait for your advertiser to contact you for posting a paid blog ad. You can notify your readers that your are paid to advertise in the blog ad. Payment made to you within 5 days.
Inblogads.com - A new paid to blog site that pay bloggers to review products, services and websites of companies. Currently only open to Wordpress blogs hosted on own domain.