My friend actually mentioned how useful this would be! One of the difficulties they may face though, at least in a market like mine (Boulder, CO) may be indexing and working with the housing that is already organized by rental agencies. There's three large ones where I'm at and I cant imagine they would make it very easy, especially if Cribspot wants to take some of the responsibilities from the agencies, responsibility that the landlords pay the agencies to take care of. It will be interesting to see how crib spot deals with this aspect considering these agencies run so much housing around here