Expansys ( http://www.expansys.com/ ) have pre-order placeholder pages up for non-carrier SIM-free Moto E & 4G G models in black or white. It looks like you'll be able to buy them here soon enough:

http://www.expansys.com/motorola-moto-e-black-261546/

http://www.expansys.com/motorola-moto-g-4g-8gb-black-261577/