I am quite surprised to see the new feature and to try it I login to my yahoo mail ID. Great, I remember the password still so the login is not a much problem. The interface seems pretty changed and it was the so called "new interface" & Google mail worked as Push & Pull factors for me to switchover.
The new new interface is good and the best part is the disposable email. I've tried with a local website and worked like a charm. Good job Engineers.. Though this alone doesn't make me to switchover atleast I remember that I don't have to google for anon mail offerings.