xmastcrazyen
Not that much of a secret as they post it on their website too.
But it means stuff like dirt cheap temperature controllers like this WillHi WH7108C (http://www.buyincoins.com/new_en/details/220v-digital-lcd-thermostat-temperature-regulator-controller-aquarium-fish-tank-product-12371.html) (perfect for kegerators, see nigel_c's (http://i152.photobucket.com/albums/s180/nigerford/IMG_0336.jpg)) are even cheaper.
Or this (http://www.buyincoins.com/new_en/details/new-25a-aa-solid-state-relay-ssr-ac-90-250v-24-380v-for-temperature-controller-product-12313.html) 25A solid state relay.
Or a whole pile of Arduino compatible (http://www.buyincoins.com/new_en/pages/search--arduino----1.html) stuff.
Another great benefit of NHC ;) Thanks for this Tube