I haven't seen a whole lot of coverage of this, and what I have seen hasn't really had all the much information. But apparently the Lakota Sioux have unilaterally withdrawn from all treaties with the United States and are taking steps to emphasize their sovereignty including plans to issue their own passports and drivers licenses, as well as opening diplomatic relationships with other countries. The most interesting step they're taking, to me, is the offer to allow U.S. citizens to move to the new Lakota Country where they can live tax free so long as they renounce their U.S. citizenship. This move could
serve to attract the talent and marketable skills that they will need to survive as a fully independent nation, but only time will tell. They've also announced that they will be pursuing energy independence through renewable sources such as solar, wind, geothermal, and bio-fuels.
The best coverage of this that I've seen so far comes from the Indigenist Intelligence Review
. It also contains the only link I've found so far to their website: lakotafreedom.com
Unfortunately, due to the recent news exposure, the site has exceeded it's bandwidth allotment and is inaccessible. I've attempted to contact them in order to offer some of my own hosting for the interim, but have yet to hear back.
Edit: the website is apparently now back up, so we have a first-hand source of information.
I'm extremely interested to learn more about what's going on, and will be doing my best to keep on top of the story. Unfortunately it doesn't really seem to have been picked up by any major news outlets, which is unfortunate. In particular it will be interesting to see how the U.S. government responds to this. In theory it's completely legal, and they were technically already sovereign. In practice, the sovereignty of the various American Indian nations has always been tenuous at best. A few other nations, however, including Bolivia and Venezuela, have apparently already expressed their support.