New Storm Worm - Kitty Greeting Card
This new HTML based attack is socially engineered well and may trick folks. It's always a best practice to avoid every URL present in an email message (even to opt out of spam), unless you are absolutely sure it's safe. 
New Storm Worm - Kitty Greeting Card
http://www.websense.com/securitylabs/alerts/alert.php?AlertID=807
http://www.f-secure.com/weblog/archives/00001291.html
http://www.avertlabs.com/research/blog/index.php/2007/10/12/no-laughing-matter-or-curiosity-killed-the-cat/
quote:
Websense® Security Labs™ has received several reports of a new Web site that is being distributed in spam sent out by those running the Storm attacks. This site poses as a free Ecard Web site. No exploit is on the site itself. However, when users click any of the URLs, they are prompted to download and run a file called "SuperLaugh.exe." This file contains the Storm payload code.