So, I got excited when I stumbled upon this extremely cool site Timbergram which makes decidedly more durable postcards - out of wood! They can engrave a message for you and send it to the person you want, or you can order them blank to write your own message!
I love a decent retro design, and wouldn't it be fun to get one of these one morning?
Here are my favourites:
Isn't this a great engagement congratulations card?