Might want to make this your weekend project! The Tweet-a-Watt, A twittering power meter submitted by Limor Fried, Adafruit Industries & Phillip Torrone from MAKE magazine is a DIY project that automatically updates your power usage wirelessly "for all of your friends and followers to view."
Using "off-the-shelf hardware," we have modified a Kill-a-Watt(TM) power meter to "tweet" (publish wirelessly) the daily KWH consumed to the user's Twitter account (Cumulative Killowatt-hours). We are releasing this project as an "Open source hardware" project - in other words, anyone can make these, modify them and make a commercial product from the ideas and methods.
They've already published the source and schematics, so in addition to considering voting for this greener gadgets, you could just go ahead and build one!