We are currently testing Google Adwords and Yahoo ads for our website. We are looking for someone with experience in developing the tracking necessary to accurately analyze conversion rates and return on investment using third-party tools like HyperTracker or something comparable that you have experience with. Ideally, we should be able to track a sale to a specific search engine, a specific ad, and a specific keyword. Candidates should be able to demonstrate experience with scripting and installing scripts for HyperTracker or something equivalent, and analysis of stats from HyperTracker, Google Analytics and Yahoo. Experience with developing sales letter websites, integrating [url removed, login to view] checkout systems and creating up-sales with 1shoppingcart would be a plus (please provide some links to sites you have worked on).