I read the snopes site. Apparently there is one that is a hoax that says CNN announced it: http://www.snopes.com/computer/virus/virtualcard.asp

And one that is a real virus but was NOT reported by CNN etc. http://www.snopes.com/computer/virus/postcard.asp

Apparently the two are getting intermingled in emails and confused. Either way it's best to be cautious about clicking links to e-cards in an email.