The strange decline of computer worms

http://www.theregister.co.uk/2005/03...secure_websec/

Computer worms are becoming less commonplace as virus writers diversify their malware spreading tactics to create the maximum effect for the least possible effort. Email-borne worms, such as NetSky, Bagle and Sober, remain perennial favourites with malware authors but Slammer-style worms are becoming rarer
instant message security threats are becoming a greater concern. "A worm that exploited an IM vulnerability to spread could spread very quickly and travel straight through firewalls,"
It's hard to convince endusers that the can get infected using IM, they think we make it up to scare them. I have them go to SARC and search for MSN Messenger. They get the point after that.