You probably know them, but oshpark is great! You pay by the square inch, which was really fortunate for me because I needed a (very) small pcb for a project,

You probably know them, but oshpark is great! You pay by the square inch, which was really fortunate for me because I needed a (very) small pcb for a project, and they made and shipped it to me (to Germany!) for less than 2$ at the time. Though I think they since implemented a lower bound on size/price. Also, the purple/gold finish is gorgeous.