Kwiry no longer exists. I have since made an update video that accomplishes the same function except it uses twitter. you can find the tutorial here: http://www.youtube.com/watch?v=yPxd2I...
***UPDATE*** This project can also be done with Tunderbird. Here's a link to the article: http://lifehacker.com/386811/shutdown...This video will show you how to shutdown your computer from anywhere using a texting capable cell phone, Microsoft Outlook and a free account from www.kwiry.com