This is pretty interesting, a device from Ambient will give you demand response event notifications and peak Load advisory notifications so you can reduce kW usage when demand is unusually high and supply dangerously short, it’s only available in NYC at this time. If these were built in to more devices (or homes) you could manually or automatically shut down parts of your home/apt in response to grid load –

Your Home Joule is a state-of-the-art energy data display device that tells you how the price of electricity is changing, hour by hour. Welcome to a community making informed decisions about energy use. These decisions are cost-effective, environmentally sound, and helpful to maintaining a reliable supply of clean electricity to you and your neighbors.

ConsumerPowerline analyzes energy price and usage data to create signals that are meaningful to consumers, and then sends those signals to Ambient Devices. Ambient uses its patented technology to match up those signals with particular Home Joule devices and broadcasts the signals on a pager network. Just as messages to specific pagers go only to those users, so do the energy signals find their way to the right Joules.

CPLN: Home Joule – [via] Link.