BTW when testing a newly built circuit you should apply power using a good current-limited regulated DC power supply,setting the current limit really low and checking that excessive currents aren't flowing - otherwise any problemwill destroy things as you've observed.
Also, the better PCB fabs like itead will offer testing services for either a small fee or free. I always select 100% testing and have yet to have a problem.
Thanks, all! I kept waiting to get an email telling me a new post had been made. When I didn't, I assumed there weren't any. Thanks very much for your excellent responses.I have a multi-meter, and in checking circuits on my PCB, I found that there was no continuity in one of three 10K resisters. I'll pick one up at Radio Shack in a bit. I was wondering, though, could that alone be the reasons for the shortscould that alone be responsible for no power to the motor?