Motorola's own website outs the 32GB Motorola Moto X Developer Edition
Turning back to the Developer Edition of the Motorola Moto X, we don't expect to see any of the Motorola goodies removed from this phone either. This model is expected to be released with 32GB of native storage and the phone appears to have a black front, white back, and silver accents. The back cover says Developer Edition so that your friends will be able to see exactly what you bought and realize that they should be jealous.
The picture on Motorola's website also mentions that the device will have an unlockable bootloader, which is what you are buying this phone for in the first place. This links to a warning further down on the site that cautions you that if you do unlock the bootloader on the phone, all warranties will be void and the act might cause serious damage to your phone. The manufacturer urges you to know what you are doing before unlocking the handset. Which reminds us that no pricing was revealed. Based on other similar models, you should expect a price over $600 for the Motorola Moto X Developer Edition.