WordPress.com has significantly enhanced the capabilities of the notifications feature that was added to the WordPress.com Toolbar.
Users now get notifications about comments on their multiple blogs. And the best part is that they can moderate the comments right from this box.
Users get all the required options on comments: Reply/Unapprove/Spam/Trash.
Replying to the comment can be done from the notification’s section without opening the specific blog post making it a very quick process.
Overall a solid useful update for the users of WordPress.com.