I'll post a Tarot card meaning/description and you guess the card. Just use the #WhatCard hashtag when posting your answer!
First one is now up; just go to http://twitter.com/usgstarot and follow U.S. Games Systems and post your answer when you see a What Card? post.
Feel free to post your own What Card? challenge! Don't forget to use #WhatCard when you make your post.