Hey,
just got my Jolla a few days ago and I stumbled over your toh idea here. There are some really nice toh projects, but this one really got me. I collected some old fm tuned radios and I use some cheap fm transmitter from ebay to play all kind of devices on them. Would be really cool to play my jolla on them without any external extra devices.
I'm excited for your next progress posts! keep going...