NSSLabs has released a report on a new benchmark, which tests AV products against "socially engineered malware" threats, primarily web downloads. This test is designed to supplement traditional "zoo" testing of historical virus samples. Based on its test, NSSLabs rates Trend Micro and Kaspersky as "Recommend"; Norton, McAfee, Norman, and F-Secure as "Neutral"; and AVG, Panda, and ESET as "Caution" with respect to these threats. Microsoft wasn't tested this year, but it will be interesting to see how they do next year.

To get the full report, you have to supply contact information (Anti-malware Test Report of endpoint protection products), but Trend Micro has posted some of the results on its web site (no registration required).

For those who can't or don't want to switch to Trend Micro products, you actually can get a large part of the benefit of its cloud-based threat network from an add-on that is compatible with Norton, McAfee, AVG and Kaspersky. (It might be compatible with others as well, but those are the ones listed on the site.) You can try out that download from here: Web Protection Add-On. Note that in order to screen your web usage "in the cloud," the URLs you access have to be sent to a Trend Micro data center. If you find this objectionable on privacy grounds, then this product is not for you.

Disclosure: I'm a customer, and also one of their outside lawyers.