Started work putting the front panel together, and also fitting the Arduinos in the case.
It turns out the waveshield is capable of driving the speaker, and it works very well indeed. The sound quality is not bad either. I used the 'sox' unix program to convert MP3 data into raw 22khz 8 bit wav data. Here is the incantation I used :-
sox the_archers.mp3 -b8 the_archers.mp3.wav channels 1 rate 22kI still need to get a decent printed card for the legend behind the top panel, but it's starting to look good.
On a side note, someone at work had an old Radio Times, which suited the radio superbly..