Hi Paul,
Thanks for the reply!
regarding the 1 wire chips I think I dropped a typo there - I know of the Dallas DS18B20 (temp) and DHT22's which I (thought) did both and were 1 wire as well. I'd happily settle for separate sensors and TBH the humidity bit isn't all that important.
The important part is the switching of outlets and in reality, each outlet is only likely to have 0.5 - 3 amps @ 230VAC on it, but the problem is everything including cabling, switching etc. must be rated at the maximum load which could theoretically be plugged into an IEC C13 outlet...
Another very interesting device thing I'd like to look at is the monitoring of two AC inputs via AC/AC transformers and doing some clever switching between sources within milliseconds...
The "monster" as you refer to it is hopefully going to power computers in a Data Centre rack cabinet - there are lots of these on the market and very little which are good value for money; APC, Geist, Raritan to name but a few.
In terms of commercial viability, I have a number of clients in this industry who would potentially be interested in this and other products. I am a qualified electrician, network engineer, electrical designer and the owner of a Data Centre in the UK......
Feel free to hit me up on PM if you want to know specifics? (I realise mods can sometimes get a little narky at shameless plugs 
)
Cheers
Lee