Google is supporting StopBadware.org and is taking measures to warn the unwary of where not to go on the internet. Better still, they've given a tool to webmasters to make sure their sites aren't used to generate links to these problem areas of the internet. We'll be checking regularly....
As part of our efforts to protect users, we have been warning people using Google search before they visit sites that have been determined to distribute badware under the guidelines published by StopBadware. Warning users is only part of the solution, though; the real win comes from helping webmasters protect their own users by alerting them when their sites have been flagged for badware -- and working with them to remove the threats.

It's my pleasure to introduce badware alerts in Google webmaster tools.