"After the Mayflower" (April 13th 2009)
"Tecumseh's Vision" (April 20th 2009)
"Trail of Tears" (April 27th, 2009)
"Geronimo" (May 4th, 2009)
"Wounded Knee" (May 11th)
Check out the previews here, at the official site. There also appears to be some interesting behind the scenes stuff, and artistic materials. It appears to be further culmination of the newly focused collective academic interest regarding Native America over the past 15 years or so. It is an official Sundance Selection.
I'm sure, someone's posted about it earlier, but I thought I'd mention it. I plan on watching it, so maybe I'll post some reviews.