A link to Yahoo Mail Beta is there when I login into Yahoo mail today. The new yahoo mail interface look very much like those of our desktop email clients such as Microsoft Outlook and it allow user to drag mail to folder, deleting mail by hitting the delete button or select a range of mail to delete. A quick check found that Rules and Wizard is still not available in Yahoo mail. The Yahoo Mail Filter still basically allow users to move mail that meet certain rules to designated folder. On the contrary, Google Gmail has a very powerful filter allow user set a wide range of rules and action.
Will post more information after testing the beta for several days.