Google PowerMeter is a soon to be launched Google product intended to help educate users about their own power usage via the internet. This is but one of Google's ongoing projects to help save power and the environment.
According to the soon to be launched page at Google.org:
"To get started, we're working on a tool called Google PowerMeter which will show consumers their electricity consumption in near real-time in a secure iGoogle Gadget. We think PowerMeter will offer more useful and actionable feedback than complicated monthly paper bills that provide little detail on consumption or how to save energy."
According to the site, PowerMeter is in prototype but will receive information from utility meters and energy management devices to provide users with access to their own energy consumption directly from their iGoogle homepage.