AAiO picks up the post, adding,

"It can’t really be said to be a positive thing when people who would rather own and live in single-family detached houses are forced by economic circumstances to rent or live with larger groups. But at least it may bring on the reform of zoning laws and anti-dense development attitudes that penalize renters, students and people in nontraditional living situations."

That's well summarized: currently, single-family detached housing is heavily subsidized, on top of its preferential treatment under the law, while any other housing arrangement is (socially and legally) treated as suspect. There's plenty of bad to go around in the nationwide financial meltdown and foreclosure epidemic, and this doesn't even constitute a silver lining - but the silver thread in the dark, stormy lining is that maybe we'll reexamine some of our land use laws and economic policies that have either run out their useful life or were simply discriminatory to begin with.