Los Angeles-based SocialEngine, the developer of discussion software headed by Alex Benzer, told its supporters this morning that it has added a number of big name customers, including MasterCard, Shell, Entrepreneur.com, and NASA. The company also said it has quietly soft-launched a new, software-as-a-service, hosted version of its service, SocialEngine Cloud. The new cloud-based service lets anyone create a community website, including discussion communities and more.