SiliconRepublic.com: Risky websites to be flagged in Yahoo! Search. From the news report:
Websites that may harm a user’s computer just by visiting them will be omitted from Yahoo! search engine rankings, following a partnership between the search company and security firm McAfee. The new service, entitled SearchScan, also identifies sites that have shown bad email practices, flooding users’ inboxes with spam emails.
SearchScan launched in beta version today and is available for Yahoo! Search users in the UK, Canada, UK, France, Italy, Germany, Australia, New Zealand and Spain.