New Chat & SMS Widget inside Classic Yahoomail!

I was using Yahoomail as usual, and suddenly something popped up with a water bubble bursting sound. I could see a blue widget above my email folders. I never did anything to get this. No settings, no modifications, no plugins. I was just checking my mail and the blue widget appeared and after a refresh it disappeared. I used the back button in my FireFox browser and took the screen shots of the chat & sms widget.
It had already imported all the contacts and mobile numbers from my Yahoo! messenger.
It looks cool, loads fast.
Here are some screen shots:
New-Yahoo-Chat-in-mail-box-Classic

It appeared in the Classic Yahoomail and not in the upgraded version of YahooMail. Upgraded version of Yahoomail already has a separate portion for chatting. But this is something new and better, as we need not move from the inbox to start chatting(some what similar to that in Gmail.)
Yahoomail-classic-chat-sms-settings

Yahoomail-classic-chat-sms
Click above image to see in full screen
Yahoomail-classic-chat-sms-box
Tab for multiple user chat
Did you notice this widget in your Yahoo mail? Hope this is in the initial state of testing. And Yahoo! will rollout this feature to all its users some time in the future.

Got the Chat and SMS widget back in my Yahoo Mail again. Its not disappearing now. Its nice to chat and adds more fun to its already famous Mail