I was cleaning up my bookmarks and came across one from a while ago from tribalgis.com.
“Tribal GIS.com is a place for Tribal Personnel, tribal members, faculty and students of tribal colleges/universities and supporting organizations to share professional forward thinking views, progressive knowledge and continuous education within a community of active GIS users serving Tribal Communities”.
The site has quite the variety of resources including videos. Below is a video in which NTGISC President Garet Couch discusses GIS in Indian Country and how GIS is having a positive effect on Tribes by providing Tribal Leaders with the information they need to make informed decisions.
Be sure to Check out the Trial GIS Video Gallery.