A brief interview with Blizzard producer Chris Millar is up at PC.IGN, talking about Warcraft III. The interview retreads a lot of information that has been available for some time (such as details on the engine, etc.) but Chris also talks about the new Undead race, and there is an interesting bit on how the multiplayer will function. Here's an excerpt from the discussion about the multiplayer mode (which sounds very different from the previous Warcraft games):

IGNPC: How will players join together and begin a multiplay game online?

Chris Millar: This is a role-playing strategy title, so you can't just start up the game and launch into battle right away -- multiple factors have to be coped with. Gameplay challenges require decisions, for example you have to decide first of all whether to save a town from attackers or not, and then if you save it what should you do with it then? Also, to save the town you may need resources or items that can only be accessed from a specific location or third-party character.