Sprint owners looking to do some custom hacking with their new Moto X smartphone will be happy to learn that Motorola just added it to their Bootloader Unlock Program list. For information's sake, if you don't already have the Sprint version of the Moto X you can get it from them now for $199.99 on a new contract if you are alrady a Sprint customer. If you are a new customer coming to Sprint, you can grab the phone for just $99.99 on a new contract. Here's a quick link: moto x: Get the Power of Google Now from Sprint
The process for unlocking the bootloader are very simple, but it's important to remember it will void your warranty on the device if you unlock it, so keep that in mind.
Source: Motorola - Bootloader Unlock Program