From the PDF linked in the tweet below:
"Hey everyone! It's me, ladyada! I recently got my Amateur Radio License ('HAM ticket') and I wanted to start out with a radio that's both inexpensive, easy to use, and fun to hack! After seeing some videos from CCC about the MD-380, I thought this radio is the one for me to start with.
Not only does this radio do FM analog on the 400MHz band, but it can also do DMR - digital encoded radio! This gives you the ability to use an Internet-backed voice network with no static and huge worldwide repeater reach.
I'm just getting started on my HAM-venture but I thought I'd take some notes on the hacking and programming I've done! Some of it, like updating the Firmware and flashing User DB, is optional - but it's also the most fun!"