I think the missing letters are because it spells another name for idiot (m.o.r.o.n).
That looks like a cool idea. I've seen peple that have 3D printed a case, and attached a battery and mini keyboard in there too. Don't know what is best for cost effectiveness or whatever. Some people have nade a case out of Lego, or canavalised an old pencil csse etc and biught a 7inch screen.
These things are all very Interesting