PNEUMAtic circUS was a networked postal art project curated by Vittore Baroni, music critic, "explorer of countercultures", and avid activist for mail art, in collaboration with Tatiana Bazzichelli (sociologist of communication with interest in hactivism), Jonas Frankki (designer responsible for Berlin collective Telekommunisten) and Mauro Guazzotti (leader of experimental noise/industrial band). It was held as part of the transmediale festival for art and digital culture, from January to February 2013 in the Haus der Kulturen der Welt in Berlin.
The project involved one hundred mail artists sending in pneumatic post capsules with instructions and scores to be used by the festival visitors for actions and performances.
You can find the gorgeous catalogue from the installation here (front cover below), with essays from the curators and many images too. The digital catalogue was unveiled recently in Viareggio, the launch marked by further pneumatic performances, with a workshop where attendees could create and transmit their own messages.
See also the Telekommunisten.net website for more about the exhibition and a terrific "inside the OCTO" video.
Images used with permission from the PNEUMAtic circUS Flikr page.