I haven't posted for a while, but I haven't been completely ignoring the PCW project. I've done a bunch of work improving the bootstrap code, so that the SD card is now quite reliable, and can cope with being removed and reinsterted. It also displays some text and a progress bar while booting, and gives the option to boot from disk if desired. However, when I try videoing the PCW booting I get too many reflections, so I'm going to try making a hood for my camera to make capturing screenshots easier.

In the meantime, here's a picture of the amp, while tonight I finally moved off the breadboard and onto the stripboard.