A wonderful and quick mash-up of Twitter and Flickr data, mapped with Yahoo, BrumEmoMap is a great example of the first thread of my Conversational Psychogeography idea. It allows people to tag place with emotion by using tweets or Flickr photos:
While it isn’t doing anything with the data — yet — the power comes from the way a folksonomy of location can evolve even on services (like Twitter) that don’t offer it directly. The deliberate placement and collaborative ethos may open the path to really usable data being collected. Very interesting.