Sarah has collaborated with the Toronto indie act the Roaring Girl Cabaret. You can hear Sarah play on the song "Passion Play" on their debut album "In Last Night's Clothes" that was released in September.
You can listen to the song here on CBC Radio 3.
You can purchase the track for a dollar on Amazon over here.
More information on the band including upcoming concerts and where you can purchase their CD is contained on their myspace.
It may be more then coincident that Joni Mitchell has a song that bears the same title.