Found via the Phonography Mailinglist:
Berlin.Soundscape-FM is a collaborative soundwork in the city of Berlin, produced at the Transmediale Festival, 4-8 February 2005.

During these four days, sound artists, amateur sound hunters, phonographers and other interested participants collaborated on gathering sounds from different locations within the city of Berlin. The collected sounds ranged from the ever-present crosswalk signals, children's voices and U-Bahn wires to the acoustics of former CIA spy stations, empty theatres and the "Memory Void" of the Jewish Museum.

All of the sounds have been plotted out on a scalable map of Berlin which remains open to further contribution, making it a vital ongoing collaboration and online community.

For more info, please visit:

berlin.soundscape-fm.net www.soundscape-fm.net