http://www.gametrailers.com/player.php?id=10421&type=wm
Long Version Here!!! http://www.konami.jp/kojima_pro/e3_2006/
See the title of the game. Notice the title of Metal Gear Solid 4 where the letter L's look like upsude down 7's, which may indicate the game comes out on July 7, 2007 which is also the 20 year anniversary of the first Metal Gear game.