As hip indie publisher PowerHouse Books gets ready to move into its giant new DUMBO space in early October, it’s hard to tell which came first: the gallery or the projects.

Sarah Rosen, the company’s blogger/magazine editor/PR woman extraordinaire, told me yesterday as we walked through the under-construction space that part of the impetus for a spate of new projects was simply an effort to fill the 5,000 square-foot “arena.” Of course, it doesn’t hurt to be a streamlined publisher with a young, passionate staff, either.