Yes, Google now helps you to still get in touch with the so called snail mail and lets you send one postcard to anyone in US.
"Sure, email is great, but there's something uniquely heartwarming about the kind of card that comes in the actual mail — especially for folks who don't hear from us as often as they should, simply because they aren't online.
So we've made it as easy to send snail-mail holiday cards as it is to send email. Simply fill out the form below and we'll send one free holiday postcard on your behalf. Yes, through the mail and everything."
So to send the postcard just fill in this simple form and you are done, there are a lot of already made templates to chose from.
Google is dong this to promote Gmail in a totally different way, the cards are based on Gmail themes that you can apply on you Gmail account. Google says it would extend this service to other countries as well from next year.