Update (May 1 2013): The post below, which is based on an outdated VM, is deprecated. Rather please see the Cloudera QuickStart VM, which runs on VirtualBox, VMware, and KVM.
Cloudera’s Training VM is one of the most popular resources on our website. It was created with VMware Workstation, and plays nicely with the VMware Player for Windows, Linux, and Mac. But VMware isn’t for everyone. Thomas Lockney has managed to get our VM image running on Virtual Box,