Freeverse has released Postman
(http://freeverse.com/iphone-os/product/?id=9004), an app exclusively
for iPhones and iPod touches running iPhone OS 3.0. It’s available
for US$0.099 at the Apple App Store.
With Postman, you can keep in touch using your pictures, greetings
and even your geolocation. It takes advantage of iPhone OS 3.0
advances such as the Map API and more.
Postman lets you create your own instant picture-postcard by snapping
a photo, editing greetings and adding personalized messages. iPhone
OS 3.0 Map technology works with Google Maps for location
identification and enables user selectable weather. Users can then
share their creations on Facebook, Twitter, Tumblr, the Web or via
email with a one-click upload straight from the App.