Now some fresh pickings from the Hurricane Grapevine: New Orleans Mayor Ray Nagin (search) greeted President Bush when he arrived in Louisiana last night, and was at his side as he fielded questions on the Katrina relief efforts this morning. That quality time with the president, however, marks the mayor's first visit to the disaster area since Wednesday when Nagin pulled up stakes and moved his family to Dallas. The Dallas Morning News reports that Nagin has already bought a house in the city, and enrolled his daughter in school. When the Mayor appeared on "Meet the Press" on Sunday...