This guide shows you how to convert a gerber file containing the paste layer of your PCB into a vector file that you can use to create a kapton stencil with your laser cutter.
This post contains code that creates a 10 KHz square wave on one of the GPIO pins of a PandaBoard running the real-time Linux extensions. It is a proof of concept showing that the PandaBoard is suitable for real time applications.
I just posted a tutorial on the Silicon Valley HomeBrew Robotics Club Wiki entitled Installing Ubuntu With Real Time Patches On The PandaBoard. In addition to instruction for installing Ubuntu from scratch, which is also described in my recent post on ozbotz.org, the tutorial explains how to compile a new kernel from source and test the latency of the OS.