Worm Attack Set for 1/5/2006
The obvious remedy to this worm, as well as others, is to make sure the Antivirus programs and security patches are updated on all systems. In addition, creating a contact in each address book with "!!!!!!!!!!!" as the email address might prevent the worm from spreading. Some worms/viruses don't have the proper error handling when an invalid email address is encountered. By having the first email address in an address book be invalid, it may generate an error and prevent the worm from spreading. Although this is not a guarantee, it's definitely cheap insurance.
For more info on the worm, visit http://www.computerworld.com/securitytopics/security/story/0,10801,106848,00.html?source=NLT_AM&nid=106848