MsManhattan writes "VMWare Inc. today is slated to introduce a new version of its workstation virtualization software that supports Windows Vista. The upgrade, VMWare Workstation 6, enables users to run Vista as a host or a guest operating system. Additionally, it allows users to store a virtual machine setup on a portable device — like as a USB drive — and transfer the set-up to another computer. Virtualization, an old concept that has gained new momentum, can help organizations optimize their infrastructures but it can also create expensive management headaches. Just the same, the analyst group Gartner predicts that three million virtual machines will be in use by 2009, up from today's 500,000."