We live just up the street from Haight and Stanyan, and the other day someone dropped off a flyer about how Whole Foods is eager to transform the former Cala Foods (now a vacant lot and boarded-up deathtrap) into a pleasant, overpriced gourmet food store with apartments on top. The design of the flyer reminded us of some incomprehensible posters that appeared briefly in the neighborhood two years ago -- could D.B.H. be back?......