Spam greeting cards?

I occassionally receive e-cards from various friends, but they always show up in my email with that friend's name included.

This week, two e-cards showed up without such attribution and I am loathe to open them. I've never heard of a spam-card or a computer virus being transmitted this way. Has it happened to any of you?

It was bound to happen

In Search of Isis got its first spam post today, purporting to be from some clod of dirt named Adam.

Adam, you wasted your time. I deleted your post the moment I saw it. I'm not interested in your get-rich-quick crap. I never will be. Be gone and don't come back.