Thanks for the reply Glenn!
It was my understanding that the project was inspected, but I haven't checked for the inspection sticker. I'll do so tonight when I return home. Even if it's there, it's possible it may only apply to the new service connection and breaker panel, not the entire house re-wire.
The reason I'm not sure if it was inspected is because the way this was job arranged was a bit unorthodox. When we closed on the house, we had no choice but to leave town the day after we signed due to my wife's job. While we were gone our realtor gave the electrician access to the house to do the job and checked in on him and his crew while the work was preceeding. The last of the job was being finished up the day we got back and checked in. Up until this recent discovery, I had no cause to complain about the work or service. The electrician even came back by the house once or twice just based on one or two simple questions I had regarding certain minor issues which he probably could have just answered over the phone.
As far as pigtailing, I don't think there's any sort of ground connect to the outlet receptacles. They're metal boxes (all the old ones I've checked so far anyway), but it's not BX cable and there's no grounding wire, so pigtailing to the box won't do anything will it?
BTW, how on earth do you think he rigged them this way?
As for grounding the disjointed sections of the pipe, I'll get that done ASAP. What size of grounding wire should I use? As I mentioned our service is now 200 amps. The copper grounding wire on the main box looks pretty substantial - I'm guessing 4 or 6 guage. Is there a standard size I should purchase?
Also, is there any danger in having the cold water pipes serve as a ground? In other words, could the plumbing in my house become energized in some way?
I'm all for caffeine and other good ways to wake up in the morning, but I'll pass on a high voltage shower!
Thanks again for the advice!