The modular data center continues to pick up steam as a solution to the growth of cloud computing and the need to produce energy efficient data centers. When you get beyond the tier-one cloud players (Facebook, Google, Rackspace), there’s a group of companies that may not have the in house engineering and facilities management staff to design a data center from building to rack. In step companies like Modular Data Centers Stockholm, which are prefabing the whole data center and shipping it to clients. EBay is pioneering the process in its new Salt Lake City center and has made the design process public, seeking design proposals from anyone with a great idea. There are no numbers yet on energy efficiency, but it’ll be interesting to see if these modular data centers can match the efficiency being churned out by the massive engineering teams at places like Google.