Yikes, hopefully that little yellow thing saved a whole bunch of additional damage!
It was really random. My Torus RM-20 shut down and none of the major components in the main system were damaged. However, it is an integrated AV system (I have 50 amps of service just for it and the major 2-channel stuff is plugged into the Torus and then into a 20 amp circuit). I have two 15 amp dedicated circuits. It took out a monoblock amp on one for the center channel, the receiver (a fairly new Onkyo TX-RZ3100) on the other and then my HT sub (Dayton Audio Titanic Mk. iii) on the common living room circuits. Took out the bedroom receiver's HDMI, the HDMI cable running thru the attic to the bedroom projector, the HDMI input on the bedroom projector, my motherboard to the pool pump, a board in my pool heater, two TVs, computer monitor, computer sound card, network DVR and one of the 8 cameras in it, a couple of network switches, router and other stuff. I was sitting in front of the computer monitor when it happened and that looked like polergeist for a few minutes before it went dead. I could just about feel the electrical field in front of me. I don't even want to talk about the insurance company (I had to do all the work, not sure what I pay premiums for and they were not what I would call pleasant). I just had a board in the dishwasher go (it had been smelling funny since it happened - only run it about once every week and a half) and didn't even want to go back to the insurance company and deal with their nonsense.
I got the sound card fixed probably just under a couple of months back and upgraded the onboard video (the PC is fairly new). That's why I re-bought some stuff and moved stuff around. I gave it a chance with what I had left for the office and just wasn't doing it for me (I have other nice systems). So I began looking and just decided for my use, I wanted an integrated. The IDA-8 was listed that day. I made an offer but didn't hear back from the seller and thought it was going to expire (it stays for 48 hours on Audiogon). I woke up at 1AM and looked at my phone and saw the email that the offer was accepted and sent payment. He must have accepted the offer just before it expired. I'll contact him tomorrow and ask him to give me tracking info (he's only a bit over 2.5 hours away - paid for shipping but I'd be willing to meet half way).