The Viglen MPC-L (<-- PDF link) is a low powered (both in terms of CPU speed and power consumption) compact computer.
They are extremely similar to the Linutop machine (i.e. identical) and are actually an FIC ION 503 under the hood.
It comes preinstalled with xubuntu, a version of ubuntu that substitutes the gnome window manager with XFCE.
Better still, email Duncan Hargreaves at Viglen (tell them the ubuntu podcast sent you) and you can pick one up for a mere £79.
If like us, you are a stickler for utilising similar OS environments for support reasons (including the window manager) then a full install of ubuntu is the way to go.
Other than gnome, a newer version of ubuntu is necessary for long term support - the version of xubuntu preinstalled on the MPC-L is 7.04 which is now end of life. This means no more automatic updates (in fact, these result in a 404 error...)
Beyond the software, the hardware has a couple of foibles, which we will need to work around for ubuntu to boot properly. ACPI support is non existent, and the BIOS does not appear to be PNP compliant.
The installation process for Ubuntu 8.04 is thankfully simple. (You will need a USB CD drive to carry this out)
BE WARNED: The installation will take a very long time - approx 2-3 hours
pnpbios=off pci=noacpi
Then press enter to save the entry.