http://www.languagegeek.com/ says it is dedicated to the promotion of Native North American languages.  A coworker ran into this site while she was trying to learn more about the Lakota language (and she made a Lakota custom locale too! :)  I don't know much about the site, but apparently there are keyboards and other things that might be helpful to those of you trying to get keyboards or fonts or whatnot.  I don't see custom locale files there yet, but maybe in the future ;-)