Two days into my up-'till-now-successful Windows 7 experiment, my computer failed to reboot. I suspect a hard drive problem, and *not* a Win7 problem, but it is Sunday night, I have a busy week ahead, and I can't afford to mess around. So I am back to running on my WinXP system. I was able to mount the Win7 drive and access it, so I easily copied all my "volatile" files back (thanking myself for keeping a careful log of the stuff I'd done). When I have time, probably next weekend, I'll do some triage and figure out what happened. Boo. Stay tuned...
(precelebration is the root of all failure)