New chief of marketing in Dell is Mark Jarvis. It's quite funny, because ''Jarvis'' isn't the surname computer giant's executives love. Jeff Jarvis and his blog BuzzMachine awake at night the PR and marketing departments at Dell since 2005, when one of the most famous bloggers worldwide forged the phrase ''Dell hell''. Media adopted it quickly and the image of Dell took huge blow. Now Mark will have to face Jeff's bullets.