Painless Linux Multi-boot Setup - Linux Today Blog. Virtualization, especially with nice virtualizers like VirtualBox and KVM, makes it easy to run multiple guest operating systems and not have to hassle with rebooting, like you do with a multi-boot setup.
But I still favor multi-booting for testing new Linux distributions. There are fewer hassles with networking and file-sharing, and when there are problems I don't have to figure out if it's something weird with the VM. The common wisdom is to have a shared home directory in a multiboot setup, but this has its own set of potential problems because it mixes data files and configuration files. So when you're trying out different distributions, your desktop settings may not translate gracefully across all of them. [wubi] Wubi megathread. HowTo: Partitioning Basics.