On the first Saturday of every August, the residents of SE Malden Street in Sellwood transform their street, sidewalks, and yards into one big fantasy: Maldenfest. Last year, they created their own Olympic Games to rival Beijing’s, and, before that, they chose a Pirates of the Caribbean theme; once, they dreamt up a very tie-dyed Maldenstock. Add props (eye patches, trophies, and, of course, beer); some classic challenges like the balloon toss; maybe a theme-determined contest of will (Wal...