While Greg Jennings, the former wide receiver for the Green Bay Packers, left the team during free agency last week and signed a multiyear, multimillion-dollar contract with the team's archrival, the Minnesota Vikings, he didn't forget his roots. He placed a full-page color ad Wednesday in the Milwaukee Journal Sentinel and Green Bay Press-Gazette titled "A Bittersweet Farewell," in which he thanks fans and the Packers organization for the seven years he was with the team.