Acquired some time ago by Amazon, long-time audiobook vendor Audible has released version 2.0 of free its iOS app, now optimized for iPad. The clean, redesigned interface features improved navigation and the ability to sign in with an Amazon account. Finished audiobooks can now be hidden from view, and up to three hours of audio can be downloaded over 3G and 4G networks while on the go. Cordy 2 (free to try, $5 full game) is the side-scrolling followup…