There's also a new fast forward button which lets listeners jump 30 seconds ahead, making it easier for them to skim an audiobook and find the section that interests them.
And then there's the new app theme.
Audible has swapped out the existing black/ orange theme (on the left) for a white, lighter, and flatter theme which more closely fits with iOS7. I for one don't care about the holy flat vs skeuomorphic debate, but the lighter colors are more pleasing on the eye, is it not?
The app is free in iTunes.