The Jet Car Stunts level library is about to get a bit of a boost once the new DLC level pack is approved by Apple. Added to the game are 26 platforming levels, all available through in-app purchase for $1.99. Also available by DLC, but for free this time, are the levels from the lite version of the game, just to add some extra goodies.
The app is also getting an update that will optimize it for iOS4. It'll get the customary retina display upgrade as well as full screen anti-aliasing on the 3G and 3GS. Don't worry if you didn't upgrade though, the game will fully support OS 3.x.
Check out the video below of some of the new DLC levels if you want to know what you are getting yourself into... they look insane.