I am having fun mixing rice/grain blends. I just did mine for the month just now and I thought I would post about it. The one I mixed today has: White rice, brown rice, red (wild rice), green millet, yellow millet, white millet, buckwheat, quinoa, and barely. I love it!
We have been doing this for a while and it just makes it easy to get a bunch of things at once (nutritionally speaking) than cooking all the grains separately. It works really well for us.