With the intent of rounding out its software stack for building hybrid clouds, Oracle is acquiring Nimbula, a provider of private cloud infrastructure management software. Based in Mountain View, California, Nimbula was co-founded by Chris Pinkham, who managed the development of Amazon's EC2 (Elastic Compute Cloud), along with a number of other EC2 team members now with Nimbula. The company also has expertise with the OpenStack cloud software stack.