One of the key components of FriendFeed is its ability to construct a conversation around an idea no matter where it’s originally placed (on Twitter, on your blog, a share Google Reader item, etc). Some have questioned the usefulness of moving a conversaion outside its intended medium and into a new environment. Those people will love today’s update which gives FriendFeed the ability to send replies from its comment back to Twitter as The Last Podcast quickly noticed today.

That’s right, you can now click on the “Comment” link below a tweet (Twitter message) in FriendFeed and you will see a checkbox below the input area that reads: “Also send this comment as an @reply twitter from [your username].” By providing FriendFeed with your Twitter username and password they can send these replies back to Twitter, espentially making FriendFeed into a reply-only Twitter client (of course the service also does much more, see our previous coverage).

When we spoke to FriendFeed right before their public launch last month they made it clear that openness was a focus of their network. This stands in contrast to a network like Facebook which does not allow other sites to access the data that they publish in your News Feed for example. Obviously there are privacy implications to think about, but if a user wishes to send that data to another service (like FriendFeed), shouldn’t they be able to?