There is another FM site, http://somafm.com/.

With “18 unique channels of listener-supported, commercial-free, underground/alternative radio broadcasting from San Francisco. ”

And the URL is very simple, just get the station name:

mplayer http://somafm.com/startstream=${STATION_NAME}.pls

Can also have the bash asking ya for easy aliasing:

read -p "Station name? "; mplayer http://somafm.com/startstream=${REPLY}.pls