Apple has just approved AnguriaLab's first global iPhone application, "Postino". Postino lets you send physical postcards to your friends and family: postcards are printed on high-quality paper, and are sent worldwide for a flat price (1.99$ for a single "virtual stamp", but you can get up to a 20% of discount for multi-stamps packs). That is cheaper than most good-quality typical postcard stamp, especially if you send abroad! The app itself is instead free right now, but it will be priced at 0.99$ soon.
The app allows you to send real cards and (contrary to all the few competitors) e-cards too. We offer nice features such as the ability to add a frame over the photo (among 20 pre-built frames), draw a signature/picture with your finger on the touchscreen (you can choose stroke size and color) to be printed below the text message, and you can check the history and delivery status at any time. For e-cards we also include a link to Google Maps, if you selected the option to retrieve the GPS coords when you snap the photo.
Availability: Postino 1.0 for iPhone is free and available exclusively through Apple's App Store.