David and Deidre Casey

I came across this alt-folk husband-wife duo (from Helena) on noisetrade, and we immediately intrigued.  They have a very polished indie-folk sound, with lots of really interesting and creative melodies.  Overall I would describe them as a mix between The Both and Trampled by Turtles...a bit less orchestral than the former, and a bit less frenzied/fast than the latter.  The music is a fascinating fusion of retro style with elements of new indie rock, and their simple voices work really well with it.  Their album "Little Fox Little Bird" is quite excellent, with hardly a bad song on it.  It's definitely worth a listen, especially since it's currently available for free on noisetrade.