Last year, at his annual State of the City address, Mayor Thomas Menino sought to prove the thesis of the recently released Nas album entitled "Hip Hop is Dead" by declaring that the rap community had given him the name "T-Mizzy." He might need some credibility and political capital with minority Bostonians after unveiling at last night's speech that he wants to save on school transportation costs by dismantling part of the city's busing......