Here's a cool app I tried out over the holidays called 'Snapshot Postcard.' The app lets you use the photos in your iPhone photo library to create a postcard for friends and family. Very quick, very handy. You take your picture, type in your message and address, and they do the stamping and sending. I shot a pic of the boys sledding out in the wilds of Illinois and sent it without even going in the house. Can't beat that. It's a free app, and your first postcard is free of charge.
Below is quick YouTube video someone recorded showing how to do it.