The rumor: Activision is looking to bring DJ Hero to mobile devices. You can assume the iPhone would be among the platforms supported. The facts: DJ Hero didn’t do too well, but Activision put a hell of a lot of money into it, so it wants to make as much of that back as possible.
Kotaku, which is essentially my home page (Drudge Report is, actually), says that Glu Mobile will be handling the port. They’ve made a lot of games over the years.