PBS Finding Your Roots

I just watched the show (I'm on the East Coast). It was excellent! I am
wondering if Maria Cortez or anyone else can share how/where one goes about
testing Native American DNA at the level described in this episode by
Carlos Bustamante of Stanford University. Also, does anyone know how much
African DNA one needs to have to be able to obtain more specific
information re areas of origin in Africa than the larger regional areas
provided by FTDNA? And where one would get it done? I looked at the
23andMe website but it didn't really offer much information.

Hopefully this gets posted in time to encourage more member to watch the
program!