Yep, that's right - after some delays and whatnot the long awaited patch for Battlefield: Vietnam has now officially been released. The changes in this patch are to many to mention here, so instead you can go see them right here.
If you don't care what's been changed but just want to get some download going, then the link you are looking for is this one. The patch has only been released in a full install version, so it doesn't matter wether or not you have already updated your game. The size of the patch is a little above 129 MB.