A Rosebud Sioux tribal member will sing the opening National Anthem, and the Navajo Code Talkers will present the colors on the opening night. The convention is in Denver this year, and runs most of next week.
Both articles from Indianz.com
ETA: Also from Indianz, David Gipp, the president of United Tribes Technical College in North Dakota, will speak at the Democratic National Convention.
Turtle Talk 
This looks like it could be one FUN convention. There’s a great set of links for it on http://www.USAMediaGuide.com. It includes links to the official convention site, the host committee’s site, the “protest” site, places to watch it live online and other convention-related sites.