WordPress announced that WordPress.com blogs are now getting comment notifications, with moderation and reply functionality. Approve, spam and trash links appear in the notifications for those who have permission to moderate.
"Clicking Reply automatically approves a comment and displays an area for you to type a reply in," says Greg on the WordPress.com blog. "When you’re done, just click Reply and you can get back to whatever you were working on, without having to navigate to the dashboard to manage your comments."
If you use threaded comments, you'll see when a person responds directly to you in the notification.
Comments can still be managed from the dashboard, of course.
This is just the newest in a series of recent improvements to the WordPress.com experience. A couple weeks ago, they launched a Chrome extension, giving users the ability to use WordPress.com from other sites.
Last month, they upped the storage limit.