When you click that link, and read or scroll way to the bottom of the page, you will see the following.......
Although the Postcard virus is real, it isn't a "BIG VIRUS COMING" (it's already been around in multiple forms for a long time now), it will not "burn the whole hard disc" of your computer, CNN didn't clasify it as the "worst virus" ever, and it doesn't arive in messages bearing a subject line of 'Invitation'