It comes to your direct e-mail saying it's from a person named skiplool (or something like that) and the subject says he(she?) saw your livejournal.
The body simply reads that he or she saw you at your livejournal and thinks you're hot (it'd be funny for those who set up LJs for their pets and inanimate objects). They then invite you to look at their pics. If you follow the link, it's just a porn website. Or maybe it's a webcam website.
I don't remember. I followed it when I was checking pyrophilia's mail for her because her computer is still broken down (to be fixed soon!!).
I just got one today.
Just delete it... it's silly.