Below is the (almost final) PCB design. The board itself is about 10x8cm, and I have some breakouts and other misc. junk hanging off the bottom (no sense paying for 10x10 when you only need 10x8, right? ;-) )

The plan is to print a copy today and verify component sizes, and then get the order submitted ASAP.

While the board is being manufactured, I will be continuing work on the drum pads and (to a lesser extent) the software. Both lines of development (electronics + frame / pads) look to be converging around the middle of September.