They said a long time ago that the game would have a "quasi-LAN". It's not going to be free and open like normal LAN, but you can start a game on Battle.net and it will utilize your LAN for the connection rather then routing through the Battle.net servers themselves. Whether this is actually in the game or not now, I have no idea, as I have not utilized LAN since I was going to LAN parties in high school almost ten years ago.
In the end, you will have to log on to Battle.net to play. Yes, I think it sucks, but I am hopeful that when they release the chat room patch they will at least give us an offline mode for the single player. I could care less about the LAN really.
In the end, you will have to log on to Battle.net to play. Yes, I think it sucks, but I am hopeful that when they release the chat room patch they will at least give us an offline mode for the single player. I could care less about the LAN really.