Go to Apple's website and find the tech specs for any of the new iPhones or iPads. Under "Built-In Apps" is iBooks. It is not listed with the "Free Apps from Apple" section. I think this is an early "leak" that iBooks will be built-in soon (7.1???). That is probably why they haven't updated it yet. Due to this information, I am expecting iOS 7.1 to come built in with a new version of iBooks.