Hello westfw, thanks for your email.
I received the eagle files.
Cerocca is right, the layout is not unrouted.
It's 4-layer board. I'm wondering if Gravitech would publishes the image of each of the 4 layers.
Actually I want to buy one Nano, but it's really very difficult for me to buy it from US. If I need 1,000 pieces, I will do. So I want to make one by myself.
Anyway thanks for the open schematic. I'm learning using Eagle, maybe I will rute a 2-layer Nano, it will be very cheaper and easy to produce, althoug the size will be a little bigger. If anyone already have do this, hope could share with us.