I dig this especially because i've moved apartments about once a year for the last 10 years. What I was hoping to see but didn't was to be able to select by specific apartment types. I like to grill - let me see all the apartments that have outdoor space in their listing and show me all the photos of the outdoor space. Or - I also like to cook - show me all the apartments that have kitchen photos and show me all of those.

That would definitely strike my interest and would be something that I sorely need. You could probably outsource the image classification to amazon turk (have people view a picture and then classify it as living room, dining room, etc...). Would definitely be neat to browse those things. I could even see it as a way to do http://apartmentporn.tumblr.com but better because I could actually go and rent the apartment!