Virtualization is obviously becoming a better and better documented topic.
Over at UbuntuGeek.com is a fresh HOWTO on installing VirtualBox 1.6 in ad Ubuntu 8.04 Hardy Heron setup, including USB Support.
Over at the other side of the Linux Distribution Spectrum, Falko Timme at How to Forge documents how to install and use OpenVZ on Centos 5.2.
So if you don’t feel like playing outside this weekend, you know what to do 🙂