1. These are your status updates. They are stored and displayed in reverse chronological order so that the newest message is at the top.
2. This is a picture that you will upload. Its always displayed in the top-right hand corner.
3. The list of messages below the picture are messages that your friends and family have left for you. You will see every message posted but will need to hit the "Approve" link for it to be displayed for everyone else. You can also hit the "Remove" button if you'd prefer it not be displayed at all.