once you plug this thing in all bets are off in the event of a fire. you're starting with the same predicament as you would with a modified power supply. the chance that something is going to be used outside of what it's made for. only in this case, if you harness the full 2000 watts on a (one) 110V line, it's your house that probably wasn't made for the application. it's all too easy to guess wrong about which outlets aren't on the same breaker.
if you have anything else plugged into the line that feeds back to the same breaker, you're just asking for it.
just to reiterate; i like the concept. the product looks to be very useful and versatile. the price is actually competitive for a ready made model, actually.
i just think that;
1) it's an accident waiting to happen selling this to your average joe in a home most likely comprised of 110v 15 amp lines.
2) anyone capable of putting together the server power supplies is much more likely to be capable of operating this thing within it's safety constraints.
3) the PS's can be had for 1/10 the price.
4) i like tinkering... especially when it can save me 90% or more of the price of a NIB component i can make myself.
for the record... my "argument" (it was supposed to be friendly/helpful information from an industry professional) is 100% sound for every homeowner who's ever faced the insurance company with the help of my associates and i. i'd hate to tell you what some of them got paid for when it comes to the blatant misuse of microwaves alone.