Jacoby Ellsbury seems to be popping up all over boston.com as the new hot endorsement machine. Boston.com did a http://www.boston.com/business/gallery/sports_endorsements/">photo gallery of famous endorsements by sports figures, and they front-loaded it with an image of a shiny, muscled Ellsbury pushing a ridiculously large tire and a photo of him at Taco Bell. Is the new fascination with Ellsbury a sign that Tom Brady might be losing ground as Boston's resident sports stud? Even after BabyDaddyGate......