Postcards — how quaint. Yet if you're on some distant shore and you'd like to send a quick photo taken with your iPhone to someone who doesn't have e-mail, HazelMail Postcards is the ticket. The new app, launched yesterday, instantly turns your photo into a personalized postcard, and the prints the card, puts a stamp on it, and mails it for you. The app is free, as is the first postcard. After that, the cost is $1.50 per postcard. Or you can pre-purchase a dozen postcards for $12.