SUBURBIA IS BOOMING—not just in terms of population, but as a subject for both video art and movies. And in discussions of architecture, Celebration, Florida, Disney's “model” community, is sure to come up, usually as an example of the interplay between deregulated corporate development and the replacement of public pace by private architectures of security or aesthetic “retropias.” In Austria, the number of single-family dwellings is rising dramatically, and Fontana, a development near Vienna, is a kind of counterpart to Celebration. It is the subject of Barbara Holub's exhibition “Set!”