Not telephony related but a lot of fun.
Last night I discovered Volumio. It allows me to play hundreds of internet radio stations through my stereo using a Raspberry Pi.
I downloaded the image for the Pi and it boots up without having to config anything. I control it from my cell phone. Although it streams at 128k my audio would be better if I had a DAC for it. If you're into audio, this is a neat little project.
The price for the Raspberry Pi has certainly gone up. You used to be able to get them for ~$35US. Now I see them for over $100 for a 4 core 8 gig model. That's kind of a bummer because I love playing with these things. I'd love to get a couple more.
Ralph