This won't really help but this is my only experience of such a thing:
I was in the university's library one evening (near exam time), and there was a power cut. I'd been using my Powerbook to look up stuff on the 'net when the power failure happened - obviously my PB kept going, but the internet connection died. I'd had the computer plugged in, since the battery was running low (I'd been using it earlier). After a while the power came on, all of a sudden...
I was happy that the power was back on, but at the same time confused when my PB started going mental - in that I couldn't open any programs... I just constantly got the spinning wheel of death. Eventually I had to take out the battery and restart to make it go away! After that it was 100% fine and I've had no problems whatsoever. Perhaps it wa a coincidence, but given the proximity of the events, I doubt it.