What do you think about Yahoo and Google's handling of click fraud? When do you decide to run a campaign on just one platform vs. multiple platforms? What do the major search engines do to get you to spend more than you want on search advertising? Did any of you participate in the Google Pay-Per-Action test? Any thoughts on why they shut it down? Do you use the client provided API’s? If not, what other tools do you use and what functions do they provide to help you? Thanks for the help!