Apparently they don't like where PvP is at and are not going to include it when they launch D3 to the public. They will later add it through a patch.
http://us.battle.net/d3/en/blog/4574895 (http://us.battle.net/d3/en/blog/4574895)
At least we can get a game soon and they are not going to release totally broken pvp. That being said I'm sure pvpers are going to be unhappy but at least they will have some time to learn the builds.