I have a hifiberry (http://www.hifiberry.com/) nicely minimalist, though no driver at present - I will await the GSOC project :-)
I have some itron VFDs from work, 256 x 64 pixel. I like these as the visibility is excellent. The only annoyance is they have a parallel interface and I use up all the PI's GPIOs. I also need to interface a rotary encoder for the tuning knob which is also a pain - not complex enough to justify an FPGA, but a bit too much to poll when the PI is doing audio decode as well. Thinking of adding a PIC or an AVR just for the encoder / VFD interface and talking i2c to it. we will see. -Steve
