I've traveled to over 30 countries since 2009, and today I wish I had brought Postcard on the Run with me. I've been using the app for the last few weeks and have become infinitely fond of it. Postcard on the Run lets you take a picture on your iPhone, iPod touch, or iPad and turn it into a postcard that can be instantly snail-mailed to anyone in the world. I know, I know; that sounds suspiciously like an app by a c
