For a fixed price of $75, you will receive 3 identical 2 layer, 3.8″ x 2.5″ PCBs with solder mask and silkscreen layers.
That seems like a good plan, but I’m also very new to this market. Are there other, better options?
And, as long as I’m asking, what software is available for Macs to sketch out the schematics and layout PCBs? This spammy article names some free choices and led me to a Mac port of Kicad. gEDA is supposedly installable on Mac OS X. There are a number of options for Windows users, it seems, including from ExpressPCB and Advanced Circuits, and probably other PCB prototyping service providers.