If you are a blogger looking for expand your audience as well as number of inbound links, then reviewback.com is for you. Even better, the service is available for free. Reviewback is a fresh, new site that allows bloggers to find other bloggers and exchange reciprocal links in the form of posts.

Once you register your blog with reviewback.com, your blog is added to the directory with the hundreds of other bloggers looking to exchange reviews.

Search through the repository of blogs by one of six ways: blog name, age, PageRank, Alexa ranking, tag cloud, or by category. The search allows you to find exactly which type of blog you are willing trade posts.

Once you find a blog you would like to review, you click “Trade Reviews With This Blogger”. A request is emailed to that blogger and they are given the option to accept or deny. If they accept, then it is an agreement between the two bloggers to review each other’s blogs with a post.

I like the service, I think it’s very easy and makes sense for newer blogs to expand their audiences. I would like to see some of the more popular bloggers join the network and offer to swap reviews with the newbies looking for some exposure.

Also, from the same guys that brought you reviewback.com, comes adgridwork.com. This is free advertising network that allows your ad to be displayed across thousands of sites. You simple place an ad block on your web page and you earn more credits the more times you show they ad block. I use it to send traffic to my link directory and have picked up a good number of links, as a result.