Instead of space, why not organize around meaning? Perhaps the whole idea of a document existing in a physical location—in a folder, say, or on the desktop—is just a hollow legacy carried over needlessly from the limitations of the real world. Perhaps we simply required those spatial coordinates to ease us across the digital frontier, and now that we've acclimated to the new environment, we can shed those old habits of thought like the space shuttle tossing off its solid rocket boosters after a successful launch.