I participated in ArtHackDay: God Mode. The four projects I helped work on were
Wherein your cell phone automagically connected to our rogue network, and recieved text messages from 'god'. If you walked up to our terminal, you could send messages from a website, as god.
Wherein a photoshop script built by Erik and Clement mashed up artwork of different dieties, pulled from my unofficial metropolitan museum api.
Wherein we provided an official unofficial app that had some very interesting backdoors...
Wherein a video may explain better than text
ArtHackDay was amazing, as always. Another one is coming up in April in Stockholm!