I don't know if anyone is mad enough to find this useful, but yesterday I was in the local 99p store and saw a whole shelf of boxes that said "Save the environment". I just purchased the one as it looked interesting, heavy and possibly convertible to something useful. Today I've opened it up and poked around. It seems well made, but unfortunately all the ic's have had the part numbers overpainted, and I haven't the time or youth any more to bother reverse engineering.
It's called a PowerSafer, and seems intended to be used with remote control TV's or Hi-Fi. It works by detecting that the TV has dropped from working current to standby and then powers down the device fully. When you use the TV's remote control to fire up the TV, the box sees the infra red of the control and applies power to the TV. A second press then switches the TV into a working mode.
I can see lots of reasons not to want to bother with it as designed, but I'm posting here as it's the most likely place to trigger the inspiration of someone who can think of something more useful to do with it than just use the unit as a box to build something else into.