Ordered yesterday from OSHPark.
This board uses an Arduino Pro Mini, which can be programmed from either an FTDI cable or via an AVRISP (which we'll do to shorten powerup time). The rest of the circuit is all discrete components, mostly SMT. The whole thing mounts on the backside of a 3xAAA battery pack.
We should receive these boards around Valentine's day, and will be testing and iterating on them shortly afterwards.