Arduino Proto Board for Espruino?

Looks good - I think you get what you deserve if you start shorting stuff out with Jumpers :)

You could potentially get rid of VIN/5V jumper now you have the E>A and A>E jumpers. I think just putting a jumper sideways along the bottom does the same thing? I guess a little graphic on the silkscreen would be helpful:

..
--  Vin-5V

|.
|.  E > A

.|
.|  A > E

||
||  All 5V

Not that my descriptions are helpful, but you get the idea :)

By the way, yes - Coffee would be neat :)