pbA firsthand account of the swift transformation of Williamsburg, from factory backwater to artists' district to trendy hub and high-rise colonyb p Williamsburg, Brooklyn, is now so synonymous with hipster culture and the very idea of urban revitalization--so well-known from Chicago to Cambodia as ithe iplayground for the game of ironized status-seeking and lifestyle one-upmanship--that it's easy to forget how just a few years ago it was a very different neighborhood a spread of factories, mean streets and ratty apartments that the rest of New York City feared and everyone but artists with nowhere else to go left alone. br Robert Anasi hasn't forgotten. He moved to a 300-a-month apartment in Williamsburg in 1994, and watched as the area went through a series of surreal transformations the warehouses became lofts, secret cocaine bars became sylized absinthe parlors, barrooms became stage sets for inde-rock careers and rents rose and rose--until the local artists found that their ideal