I wanted a quick Ubuntu server installation and installed the 10.04 server installation from virtualboxes.org. Unfortunately for me, the keyboard layout wasn't correct and I wanted to change it. Not being very well versed in Linux and all it's ins and outs, I wasn't sure how to do this. I found out that you can change your keyboard configuration by using the following command:
dpkg-reconfigure console-setup
I ran through a few steps and now have a nice and easy to use US keyboard again.