It seems Yahoo is going the same route as Google and is now displaying a Pagerank on their toolbar. Yahoo calls it Yahoo! Web Rank.
Yahoo! Web Rank is the name that Yahoo has given to a technical measurement of a particular URL’s popularity. If you choose to enable the Yahoo! Web Rank feature on the Yahoo Companion Toolbar, a toolbar icon will display the Yahoo! Web Rank value of each URL that you visit. The Yahoo! Web Rank values range from 1 to 10.
How does Yahoo Web Rank work?
The Yahoo! Web Rank feature of the Yahoo! Companion Toolbar works by collecting anonymous URL data about the page you are visiting. This anonymous URL data is sent to the Yahoo! Companion servers, and a Yahoo! Web Rank value is returned to the Yahoo! Companion Toolbar as one measurement of the popularity of the Web page or URL you are visiting. You will see a small icon on your Yahoo! Companion Toolbar displaying the Web Rank value (on a scale of 1 to 10) of the site you are currently visiting. The Web Rank values are calculated using a sophisticated scoring algorithm that provides a measure of the popularity of the Web page or Web site that you are visiting.
