I have no idea what happened, but just before noon, the power flickered a few times, and then went out. Fortunately, I have a UPS on my Linux server, so I was able to shut that down in an orderly fashion - and the Laptop has a battery, so that's ok. The Mac mini went down hard though - hopefully, no problems there.
In the meantime, the BGE power trucks have stopped in front of the power boxes that sit in our side yard twice. I have no idea what they've been doing there - they haven't opened the box either time. The power is out in the whole neighborhood, so it's likely not a problem there (unless they were checking for something like surge damage? Who knows?). In the meantime, the automated service tells me that I should expect power to be back by 3. It's a beautiful day out with no wind, so it's got to be an accident of some sort - car crash, line cut while digging, etc. We'll see.
Meanwhile, no chance of watching the NFL. Figures - the Giants have finally figured out that it works better if you don't hand the ball to the other team.