Now that the glory days of moving to Brooklyn after being priced out of Manhattan are all but gone, the question remains: where do Manhattanites move? The above I.R.S. graph is based on net migration and shows a clear trend; while Staten Island seems to be a last resort for the priced-out set, The Bronx has attracted more Manhattanites than Brooklyn since the beginning of the decade.From 2001 through 2006, over 23,380 Manhattanites relocated to......