Could you get a really low Energy Star thingi if your consumer electronics device, such as a hi-fi system had a battery powered standby mode.
So like there's this battery-powered sub-device within the product which detected the standby off command from a remote control and switches on the rest of the system, and also it has a clever battery low thingi so when its running out of juice, it switches on the device just enough to recharge its own battery.
Hmm, an IR receiver needs about 5V and 0.015A supply so that's 0.075Watts
A watch battery should do the job, it'd need a chunky relay or two to do the mains switching, and a bit of a capacitor for the charge, but shouldn't add more than £15 to the bom.
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