Native Mobile. That is, things on your phone or tablet that look like they belong there instead of belonging on a crappy web page.
Facebook tried writing their mobile app using HTML5, but gave up and went totally NaMo. Thank God!
We asked Krishna if we could add some simple animations to our Android app, and he completely NaMoed it out with a spinning list view transition, dancing pandas, and light saber sounds.
I don't always show ads, but when I do, I prefer NaMo ads.