VMware to VirtualBox
My tests with VirtualBox went well enough that I decided to move my webserver and mailserver VMs to it (from VMware Workstation 6 beta). VMware does the job great, but VBox is open source and a little faster. So the machine serving this page to you is now running in VirtualBox
The conversion process isn’t exactly straightforward, though. Unfortunately there’s currently no tools which can convert a VMware hard disk image into a VirtualBox one. So with help from the guys in #mdv-cooker IRC - especially Colin Guthrie, thanks Colin - I used the following method.