Yikes, that would scare the C out of me! Since the power company is ignoring you, why don't you get a voltmeter and see if you can pick up any readings?
Yeah, this is probably dangerous, but my curiosity would get the best of me.
You don't have any significant electrical devices on you bike-a powerful battery fot a 10 watt light?
I don't picture static electricity repeatedly shocking you-I get shocked in AZ when I go there, but it is a heck of a lot dryer than Virginia, and it has never happened on a bike-just when going across a carpet etc.
You weren't wearing any new clothing?Something you have never worn while riding before?I think wool is know for static electricity?Nothing new on the bike? I doubt the synthetic biking shorts lose electrons the way wool did??
Luck,Charlie