These boards are 5cm square, so they're large enough to accomodate a simple circuit in the prototyping area, and small enough to be cost effective to build.
There's no programming header on this board. I'd like to program them through the I/O pins. If all goes well, I'll make a pogo pin rig to do that.
I've sent the boards off to Seeed for fabrication. In about three weeks, I'll get to see if they work or not.