Did you get an MSN message that looks like this?

YourFriend@hotmail.com says (2:26 PM): http://PictureFreakz.com/?user=yourmsnnameℑ=DSC00567.JPG ?!? ... HAHAHA!!

Be careful - this is a scam site that invites you to enter your login information and password - then uses it to rope in your contacts with similar messages sent from your account.