The much anticipated Facebook Messages is slowly rolling out and much like Google did with Google Voice they are limiting the number of new users each day by making you ask for an invitation which you can do at: Facebook Messages
Facebook Messages has always been the place for private exchanges on Facebook, and this won't change. With the new Messages, now you have easy access to all your private conversations with your friends in one place.
The new Messages interface not only displays the Facebook messages you exchange with friends, but it also interweaves your chats, texts and emails (should you choose to create an @facebook.com address). It's a central place to control all of your private communication, both on and off Facebook.
Now when you view a conversation, you're actually looking at a complete history of all the communication you've shared with that person on Facebook - it's like having an ongoing record of your friendship.
Also added a few key features:
- Faster interaction: If you want, you can send messages just by hitting your Enter key, so the new Messages is as fast (and as informal) as an in-person conversation.
- Integrated communication: No matter what you're using to communicate (Facebook, mobile or email), your conversation streams quickly and seamlessly into one place.
- Smart filtering: You'll always see what's important to you first - messages from the people you're close to take precedence over mailing lists.
- Revamped search: Search for either the person you were talking with or what you were talking about to quickly find your message and all the related context.
- Adding people to group conversations: Loop new people into the conversation, giving them full access to everything that's been said so far.
- Forwarding: Pass individual messages along to other friends.
- Unsubscribing, or removing yourself from a conversation: Leave a group conversation when you no longer wish to receive new messages.
- Sending attachments: In addition to sending links, photos and videos, you can now attach external files to your messages.