Places to look for radio stations

Community Radio Browser (radio-browser.info)
Google Search for station and pls
Google Search for station and m3u

Useful ADB commands

Start last used station

adb shell am start -n "org.y20k.transistor/org.y20k.transistor.MainActivity" -a "org.y20k.transistor.action.SHOW_PLAYER" --ez "LAST_STATION" true --ez "PLAYBACK_STATE" true

Start a station that is in the current list of stations

adb shell am start -n "org.y20k.transistor/org.y20k.transistor.MainActivity" -a "org.y20k.transistor.action.SHOW_PLAYER" --es "STREAM_URI" "http://live.kcsb.org:80/KCSB_128" --ez "PLAYBACK_STATE" true

Places to look for radio stations
Useful ADB commands

Start last used station
Start a station that is in the current list of stations