This is cool stuff which I found when I was looking around maps. Map Envelope can help you in create an envelope with a custom message and your location on it which is showed with help of Google maps and best is you can print it in the form of standard envelope and send it across. Here is how it looks :
Just enter your location and message and hit the enter key to get this @ Map Enevlope
Related : Create custom Google Maps from your Geotagged Flickr Photos
