Got my blank boards back from OSH Park, they having pretty quick turnaround nowadays. I ordered on 2/27, they shipped on 3/9, and I got them today.
Built two of the 1.0 version with all SMT, no surprise they worked fine on the bench, it's a pretty simple design. In testing I did note that accelerator cap would be useful if you run the board at 18V, I can increase the resistor in series with the relay to 1K and keep it from getting overheated. I'll also chop the value of the input filter cap down to maybe 47uf, I don't need nearly that much filtering for just a relay.
The input trigger can be AC or DC from around 2.5 volts to 18 volts, pretty flexible. It's also opto-isolated, so it can come from anywhere.
Given that all I've done is added the accelerator cap and the two jumpers to make wiring this to switches easier, I'm going to "shoot the dice" and order a batch of boards, with the thru-hole relays, what can go wrong? 
