Apparently the gaming company Activision will be releasing a new game this sometime in 2009 entitled "DJ Hero." Not much detail has been given about this from the CEO of the company, but has released that you will actually be using turntables to play the game.
http://www.1up.com/do/newsStory?cId=3172548
It also appears that Tiesto himself is working with Activision on this project, with some of his productions within the game itself.
http://www.1up.com/do/newsStory?cId=3171692