In performance-based lead buys, we like to is ferret out all the cost-per-action, cost-per-sale, and cost-per-lead deals we can and include them in the mix. The list of networks, Web 2.0 businesses, and individual sites offering cost-per-lead or cost-per-action deals grows daily. Often, this includes some of the most premium sites on the Web.
Read more at http://www.clickz.com/showPage.html?page=3626782