If you're a fan of Twitter or just like to comment on every little thing you're friends do: you're going to love Facebook's new feature that allows commenting on mini-feeds. Now, whenever a Facebook friend adds a new friend, updates their status, adds a song to their profile - you get the idea - you and any other friends can leave comments on that activity. Look for the little bubble with a "+" inside to leave a comment.

This should fit nicely with the recent ability to import feeds from YouTube, Google Reader, Pandora, Last.fm, Hulu and Stumbleupon into Facebook mini feeds. Essentially, beyond sharing, you can get a real conversation going around just about everything on your Facebook profile.