I just posted a dupe -didn't see this - sorry.

There is a lot going on with this - including some dissent with the native americans saying that the people that succeeded didn't have the authority to speak for all these folks. Here are some other links I have on it:

USA TODAY blogs
Technocrat.net
Rapid City Journal
Nowpublic.com

RE: The Raw Story | Descendants of Sitting Bull, Crazy Horse break away from US