bzr co http://repository.varesano.net/Femtoduino
What's the plan for getting a bootloader in it so that sketches can be uploaded?
Will you have some kind of socket it can be placed on top of for testing?
Can the pinout be adjusted to make it more convenient to connect a standard FTDI (or equivalent) adapter for programming?
Why have a 10K current limit resister for the power indicator, and then load down D13 with 330 ohm? Will the power LED even turn with ~0.3mA? ((5V-2V)/10K as an estimate)