CNET News.com: System alert: You’ve got worms:
“Some media reports suggest that a few of the present crop of viruses differ from those that infected computer systems in the past. One difference, they say, is that these bugs can capture e-mail addresses as well as IP addresses that can later be used to generate massive amounts of spam. How real is that concern? While it’s tempting to wonder whether the latest viruses are being unleashed with a profit motive — and the goal of using computers to send spam — most people agree that it’s unlikely.”
This is a good opinion piece on viruses, with particular attention being paid to whether spammers are behind recent attacks (unlikely) and if moving to a non-Windows OS makes sense (yes, unless everyone else does too).