Mercent Corp., a provider of online retail merchandising technology,  recently partnered with Web analytics firm Coremetrics to launch a  new platform called Coremetrics Marketplace Powered by Mercent. The online marketing platform is designed to consolidate the management of online shopping feeds and automate cost-per-click bids, category management and product assortments. Bass Pro Shops, Levenger, SmartBargains and ExOfficio, all joint clients of Mercent and Coremetrics, are using the platform. To my knowledge, this is the first time that a leading Web analytics  firm has offered a turnkey integrated solution for data feed  marketing and shopping feed management, said Eric Best, CEO of  Mercent, Seattle. Reciprocally, I'm not aware of any data feed marketing vendor that  offers native, integrated support of a leading retail analytics  platform, he said. In essence, Coremetrics, San Mateo, CA, is selling and servicing