I recently ran another 'how to make a Printed Circuit Board' workshop at Nottingham Hackspace.
This time the PCB was a board to convert an old ATX power supply into a power supply, giving 3.3V, 5V, +/-12V fused outputs with terminal post connections. This PCB was quite simple and single sided.
Here is the full design (made using KiCAD) and some photos of the event.
The presentation from the workshop is available here. Here is the finished single sided PCB and some photos from the workshop:
The KiCAD files are available here. The PCB board design is shown here as a pdf, along with the silk screen to show the layout of the components: