I backed this project a few months ago --
I have been playing with it for about a week now. I used a Pi 2 as the base, as the wireless components in a Pi 3 were reported to introduce noise. I just finished modifying piCorePlayer with the GPIO tweaks discussed in the campaign.
I now have a delightful "Steampunk" Squeezebox player, and am re-acquainting myself with vacuum tubes 50 years after my last tube "wireless" (a '50s vintage console AM radio).