For each unique visitor it receives, Temporary.cc deletes part of itself. These deletions change the way browsers understand the website’s code and create a unique (de)generative piece after each new user. Because each unique visit produces a new composition through self-destruction, Temporary.cc can never be truly indexed, as any subsequent act of viewing could irreparably modifiy it.
Eventually, like tangible media, Temporary.cc will fall apart entirely, becoming a blank white website. Its existence will be remembered only by those who saw or heard about it.
Another project by Zach worth mentioning is Lose/Lose. It is a video-game with real life consequences. Each alien in the game is created based on a random file on the players computer. If the player kills the alien, the file it is based on is deleted. If the players ship is destroyed, the application itself is deleted.
found at CreativeApplications.Net