I didn't get that until I saw the news this morning.
LOL!!
There's a lot of psychological information packed on that page.
The date: In Obama's mind, time probably stopped in 2008, when he was at his most messianic. Can't accept the way people view him in 2011.
His giant signature: Total ego, placed square in the middle of the page.
Michelle's signature: Pushed off to the side to make room for her husband. (Did she sign before or after Obama? Why couldn't she sign below his name? Probably some ego at work there too) Her signature is much smaller and more legible. And she makes her "O" look like a crescent moon. That's nice.