We've got good news and some vaguely upsetting news. First, the good news: Machine Gun Jetpack will finally touch down for $0.99 next week, on September 1, as a universal release on iOS (i.e. it works across iPhone/iPod Touch and iPad).
The vaguely upsetting news? Developer Halfbrick has renamed Machine Gun Jetpack, presumably because the title was just too awesome. The game will now officially be known by the much more fanciful title, Jetpack Joyride. Halfbrick released a video explaining that the name was changed to reflect that the game now includes "so much more than just the machine gun jetpack."
Unofficially, of course, it will always be Machine Gun Jetpack in our hearts.