Rough Type reported Increasingly worried by the use of conventional web sites to distribute the viruses that turn innocent PCs into botnet "zombies," Google appears to be readying a plan to police the web. If the plan goes forward, Google will use new software to automatically identify compromised web pages in its database and label them as "potentially harmful" in its search results. Because being labeled as suspicious by Google could devastate a site's traffic, the move would raise the security stakes for site owners dramatically.
This is very good news. I hope that they will share the sites they discovered with the virus protection companies so they can warn us when we go to sites that we identify other than through Google.