I have friends who still send postcards when traveling overseas, an anomaly in an era when you can snap a cell phone shot and MMS it anywhere in the world. As quaint as the act is, there's something more mnemonically durable about receiving a physical postcard.
It's for those postcard senders that Austria-based Markus Huttary's Polapost concept is designed. The Polapost is a digital camera with an integrated printer, so you can shoot your own postcards on site, and tweak them via the onboard touchscreen before printing. Perhaps there's a bigger market for instant film than Polaroid realizes....