It stars Robin Wright, Sandra O, and an actor from Tunisia with the most amazingly musical name: Abdel-Latif Kechich.
It got alot of bad reviews... mostly about how parts of the plot strain credulity. For me, the ways in which the film goes too far plot-wise are so disturbingly visceral that I thought it worked.
*its in digital video as you will notice
Incidentally, the guy who plays the marimba, Jon Brion, scored films such as Magnolia, Eternal Sunshine of the Spotless Mind and, I Heart Huckabees. And the guy who sings harmony likes to gently (and somewhat auto-erotically) play his torso... silently.
