DAVID TAYLOR, PhD, has been an e-business strategy and measurement consultant for fourteen years. Prior to cofounding eMarket Holdings in 1999, he was group vice president of e-business for Gartner Group. He started Gartner Group's consulting practice on EDI in 1987 and Gartner's E-Commerce research group in 1988. Before that, Taylor managed business applications software products for AT&T. ALYSE D. TERHUNE has nearly twenty years' experience in the information technology field. She was a research director at Gartner Group and headed their Electronic Commerce and Extranet Application servi...