Londoniser is the result: 12 different keyword streams of Flickr images of London. And while it doesn’t really scratch the surface of what Yahoo Pipes can do, I think it’s fairly interesting.
You can also use the badges feature of Yahoo Pipes to add maps and lists to a site, and you can of course export data in JSON, KML, etc, but that’s another story.
For the moment softcities is hosted on this domain, though I intend to add more cities and maybe even move it to a separate domain in time.
n.b. the title’s pinched from Soft City, Jonathan Raban’s classic portrait of urban life.