http://home.digital.udk-berlin.de/~jussi/projects/urban_eyes/main.html
Take some RFID chips, stick em in birdseed, feed them to pigeons and track the pigeons with CCTV cameras, allowing you to see the world like a pigeon. Interesting idea.
Blurb: “The experience is essentially about being connected to the bird, the way it experiences the common living circles. Hence acquiring the data, the images and videos directly from the net would be utterly different experience, lacking the physical connection to one’s environment and its inhabitants.”