I noticed this on the CNN website for the first time today — there is a little t-shirt-shaped icon next to some of the stories with intriguing headlines. The only other icon there is the video camera denoting video content. There is a list of all of the shirts they have come up with so far here. Some highlights:
“Robo restaurant a hit with diners”
“Food zips on rails in automated eatery.”
“Look out! Your groceries are shrinking!”
The design is simple: the headline, and in a smaller font below, the phrase “I just saw it on CNN.com” followed by the date and time that the article was posted.