Here’s an incredibly fun way to devise up home automation using Twitter Status updates as commands for remote-control of your home appliances. This is a really cool project (as any other Twitter hacks) as it makes use of your actual @reply messages to control your home.
With http://twitter.com/MattsOffice you can send a command by placing a keyword in a @reply message. Valid keywords are “light”, “bright”, “dark”, “temp”, “hot”, “cold”, “lcd”, and “view”. For example, to retrieve the temperature of my office I just need to update my Twitter status with a simple question like “@MattsOffice What is the temperature?”