Gamespot has a complete rundown of the 11 new maps that will be included in Battlefield Vietnam. In the singleplayer version, 3 of those maps will be played twice. If you are as excited about BF:V as I am, then you must check out this article.

Hop To Soldier! http://www.gamespot.com/pc/action/battlefieldvietnam/preview_6087066.html

As an added bonus, we will throw in this preview of the soldier classes absolutely free!
http://www.gamespot.com/pc/action/battlefieldvietnam/preview_6085902.html