Traces in the wireless city
They call it public authoring, and it picks up on the idea of leaving your mark in the environment (see previous posts on graffiti). Proboscis illustrate the concept through this and this (they're a bit slow, so you could do something else at the same time!). That leads nicely onto flaneurs and storytellers and their place in the urban tapestry. Also there's a blog and, of course, because I retell this backwards: here's the front page.