It’s not an embedded Linux distribution – it creates a custom one for you.
The Yocto Project is an open source collaboration project that provides templates, tools and methods to help you create custom Linux-based systems for embedded products regardless of the hardware architecture.
Download Mirror: http://mirrors.kernel.org/yocto/yocto/yocto-1.1.1/poky-denzil-7.0.tar.bz2
Board Support Packages: http://www.yoctoproject.org/download/all?keys=&download_type=1&download_version=
$ git clone git://git.yoctoproject.org/poky.git