I hate comparisons, but for fans of the Innocence Mission, Over the Rhine and the Weepies; primarily female vocal-led folk rock.
I downloaded their new Christmas album two days ago, and it excellent and extremely diverse. About half original songs and half traditional, and with a variety of styles and singers. It is actually titled Brown Feather Sparrow and Friends, as lead singer/songwriter Lydia van Maurik turns over creative control and vocal duties on many of the songs. Buy the albums below; listed newest to oldest.