Not saying it's a particularly efficient idea, but if lightbulb miners are going to happen I'd rather see something like that than I would a separate controller, cgminer instance and wifi transceiver in every single bulb. It makes a whole lot more sense for machines whose existence is to produce heat. Lightbulbs are a stupid idea because all the developments in lighting from the last several decades are designed around making them produce less waste heat, so taking a 60W-equivalent efficient light and making it a 60W light again (with several times the initial cost) seems pretty backward.
What about peltier elements, ever messed around with them as a means to dissipate heat? They've become quite inexpensive and could serve as an intermediary to the heat sink and offset some amount of power use?