[Alug] Looking for a low-cost Linux based single board computer

Hi everyone, I am trying to get hold of a low-cost (<£100) single board computer that will run embedded Linux. This will be a project for a major blue-chip company, and will be an excellent leap forward if we can use Linux instead of a cheap windows pc-based solution. If anybody knows of a company selling this sort of thing, preferably in the UK, I'd be glad to hear from them. I have looked at linuxdevices.com, and embeddedlinux.com, both of which are strong on documentation, but weak on where I can actually buy boards from...