This is an excellent little C program which plays MP3 music files from the command line (no X gui)...
http://hzqtc.github.com/2012/05/play-mp ... libao.html
I also tried his Play URL version which also worked a treat...I just found a local radio station broadcasting in MP3 format (not BBC unfortunately) and hey presto! - turned my Pi into a digital internet radio
Don't forget to install the libmpg123 and libao libraries first before trying to compile it...
sudo apt-get install libmpg123-dev
sudo apt-get install libao-dev
Hope this helps,