Sony released the Xperia Z kernel source code even though the device is still not available in most parts of the world (except for Japan). The idea, apparently, is to allow custom ROM developers to get an early edge and already start making customizations for Sony’s superphone. Moreover, I would assume this is also a part of the Japanese company’s agenda to be a good open-source citizen, supporting the community whenever possible.
The Sony Xperia Z will start selling by the end of this month and it will be one of the first devices with a 5-inch full HD screen. In addition, it will also pack a quad-core processor, 2GB of RAM, 13-megapixel rear camera, front-facing one, 3G/4G and Wi-Fi connectivity and so on.
Developers looking to get the Xperia Z ROM can do that from here.