I like to build electronics. has a PCB-mill. If you live in Sweden or any nearby country and want a PCB milled faster than but more expensive than China contact me! (single or double sided, unplated vias, contour routed, drilled). Clearence is ~0.3mm (0.2mm with brand new cutter). Vias under SMD/SMT's are not a good idea.
I'am from the NetBSD world, but i hear NetBSD is coming to RPi as well :)
Best regards Mikael
(at) chroma (dot) se