There is no open pvp. There is PvMP, player versus monster player. It all takes place in the Ettenmoors, which is completely isolated from the other regions. Once you reach level 10 as a player you have the option to create a monster player (actually up to 5 of them per server). Orcs, wargs and spiders are all options. Monsters start at level 50 and have several quests and such to acquire new skills. Or you can fight against other level 50 players that have chosen to travel to the Ettenmoors. There should be raids and such to try to gain/keep control of key locations such as keeps.
I haven't played around with it much, and it is still being added to and tweaked. It certainly is not the main focus of the game, so it will appeal to some and not others. Open beta starts at the end of the month I believe, though I don't know if it is truly "open" in that anybody can create a character.