I encountered a formulation of "thingfinding" (http://is.gd/ozjk) today and it got me thinking that this could be the basis of a fairly easy-to-make and really awesome DIYCity application. Could we begin to build a ground-up database of things in the city?
I'm imagining a smartphone app that just allows you to take a picture of something, say what it is, and then it gets entered with location data into a database. Perhaps it would also allow for some additional metadata to contribute to its description.
Eventually, everything people care enough about to submit might go in here. Everything from favorite types of shampoo to the Brooklyn Bridge. It would be the beginning of a kind of location-based catalog of the stuff that exists in the city. Eventually, you would be able to query it and find the closest place to buy that shampoo, or in a broader way to find anything else you needed or were looking for.
Maybe it could just start as a database of people's favorite things, and see where it goes from there. I'd be happy to help out on this if anyone is interested in developing the concept/application.