There are two places I know of that have NxGen Modular Data Centers. Each of these was driven by specific individuals who I doubt would claim to be the decision maker in choosing NxGen Modular.
What is the problem? How about the NxGen Modular site is unavailable for a week and looks like it has vanished from the data center landscape. The current page says only this. http://www.nxgenmodular.com
Thanks to Google you can see the page was last live on Apr 4, 2014.
Wonder how much longer the NxGen Modular installations will last give the company has disappeared and the people who choose NxGen have moved on as well.