Link to February 5 DaniWeb post (via Slashdot).
Some of the numbers from the Websense Security Labs report:
95% of user-generated posts on Web sites are spam or malicious.
85.8% of all emails were spam.
81% of emails during the second half of the year  contained a malicious link.
71% of Web sites with malicious code are legitimate sites that have been compromised.
58% of all data-stealing attacks are conducted over the Web.
13.7% of searches for trending news/buzz words (as defined by Yahoo Buzz & Google Trends) led to malware.
Link to report. (pdf file)