If you follow VMware, you may have also followed the recent brouhaha over its release of vSphere 5, its virtualization and cloud computing suite. Specifically, VMware sought to institute a licensing model based on VRAM usage and the number of virtual machines used by an enterprise or organization, rather than a model based on the number of CPUs. Some sites dubbed it “the VMware tax.” VMware has since made changes to the licensing model, as detailed by Savio Rodrigues here. Despite the changes, Rodrigues correctly notes that VMware’s actions leave the door wide open for deployment of open source hypervisors that can mean big cost savings and flexibility.