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When using a quality 1000 watt PSU, if you run more than 1000 Watts should it cut all power and reboot, od do they just burn out? I ran a little more than 1000 watts on my ultra x3 1000 watt psu and I blew it...

A really good PSU can sustain some Watt in excess but not for a long period without incurr in problems. But you've to check the A in the various voltages: I've see a 650PSU that can sustain up to 730W.
Due to the technology used to build them normally good PSU shall cut out power if you use them over the specs, but is not unusual that  they blew up if the over power is all on 1 line (I see your PSU can sustain a max of 840W on 12V, there are PSU of coolermaster rated for 800W the can arrive to 780W and the 1000W can sustain 984...)

 

Yeah 1000watts PSU is usually quality made and they have peak power usage past the limit for a short period of time. Most should have an auto shut off mechanism. I highly doubt it blew but more then likly blew something else, such as ram, maybe mother board, depending on what was having a lot of power drawn to it at the time.

Perhaps you blew a circuit in your house? Or worse, a fuse?

Have you checked that?

What brand and model of PSU is it exactly?

http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=4267989&CatId=2535

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=41

I tried it on a working PC and it did not go. Its not the house fuse either...