Security researcher Michael Sutton also discovered that Yahoo! hosts a significant number of bogus websites - as identified by Google's blacklist) - that try to trick surfers into handing over Yahoo! login credentials. Information from the list is used by anti-phishing technology within the Firefox 2 browser and by the Google Toolbar for Firefox.
To top it all off, a bit of irony in the fight against phishing, the blacklist that Google made available accidentally contained usernames and passwords at first, though it was quickly corrected. A great way to start 2007!