Over the last year a new form of Blog Marketing has developed - Pay Per Post. Essentially, this means a client can now pay to have articles about their product or services written and published on a group of relevant weblogs. The ethical implications are obvious and the FTC stepped in in December 2006 with the observation that relationships with sponsors must be disclosed.
ReviewMe, CreamAid and PayPerPost and Blogsvertise are the leading players in the field.
Bloggers are generally required to write between one and two hundred word pieces (not always necessarily positive, depending on the service....) for which they are paid between 25 and 1000 USD. The cost is based on the importance of the blog as measured by Technorati etc.