I new website called Review Back has launched that allows people to swap reviews. They are releasing it into Beta today. It is designed to be an alternative to ReviewMe and other Pay Per post sites. I think it is a good idea. Just make sure you trade links with people in the same area you are in. It does not have to be a competitor. It can be a site that offers something in the same area but a different vertical than you do.
By the way this is not a traded review. I just did this on my own.