Open cloud manifesto is a set of guiding principles to increase the cloud adoption through open collaboration and appropriate use of standards among cloud providers. Through open collaboration the cloud providers seek to address the challenges of cloud adoption such as interoperability, security, portability, governance and monitoring/metering. The complete manifesto is available here. The manifesto seems to have been driven by IBM garnering support from cloud vendors such as Cisco, SAP, EMC, HP, Sun, Rackspace’s Mosso, and AT&T among others. However, Microsoft, Google, Salesforce, CCIF and Amazon pulled out of the open cloud manifesto citing reasons on limited openness when drafting the manifesto. Among all the coverage in blogosphere on the topic, I liked the views of Phil Wainewright which is available over here.