EXBURBAN DREAMS DEFERRED. Over the past few years, stories of far-flung suburbs decimated by foreclosures have become newspaper staples. With resort-like names such as �Pocono Mountains� (in Pennsylvania, a 5-hour commute from New York City) and �Villages of Avalon� (in Riverside County, Calif., over an hour from downtown L.A.), it turns out that for many young families, these communities really are little more than a fantasy. The American romance with house-owning has long eclipsed concerns about the negative impact exurban lifestyles have on our larger society: more gas guzzling, loss of green space, and ethnic homogeneity, just to name a few.