I'm trying to learn how to use eagle because the fablab I have access to has a modela mini mill set up specifically to cut pcb's from eagle files into copper clad board. So I copied most of this schematic from the sanguino files and then laid out the board myself. It's single layer and I was very proud until I realized the board didn't update when I made a change to the schematic, so now there's no jumper for a 9v input.
Please take a look and tell me what could be better, or what you'd want on a board for the 644p's. I think 2 layers is a possibility, the board is just more expensive and I'll have to be really careful lining it up for the 2nd run. If anyone wants a few let me know, I'll be ordering some pieces of copper soon.