Sending Text Messages with iChat

I was listening to the MacCast and learned that it is soooo easy to send text messages using iChat on the Mac! All you do is add a person, select AIM acct., enter +1 and the mobile phone number with area code as the person's name, and then you can start sending text messages via iChat! The messages come back to you in iChat. There is a link to click when you want the messages to start going to your phone.