Does anyone know of an app that automatically sends a text message when you leave a specific location? For example, when I leave work, I'd like my iPhone to send a text message to my wife to let her know that I'm on my way home. I've searched in the forums, app store, google, but I haven't been able to come up with anything. As a side note, I did see an article about an app with this functionality, but I didn't download it when I saw it at the time (about 7-8 months ago). I thought I saw it on tuaw.com, but I haven't been able to find it again.