I'm not sure about resources for learning how to design PCBs; I was lucky and had direct instruction from a very experienced ECE. However, I would like to note

I'm not sure about resources for learning how to design PCBs; I was lucky and had direct instruction from a very experienced ECE. However, I would like to note that I had great experiences with 4pcb.com/Advanced Circuits for small (1-5 board) batch production. The prices are definitely not as cheap as outsourced PCBs but the turnaround time is great (a couple of days). I even called them up at 3:30 A.M. EST and reached an engineer on the manufacturing line that was eager to answer my questions! When I used them, their student discounts were very attractive. Even earlier than that, they used to hand out free pizza coupons to student customers! :)