Warhammer Online. IGN ended up with the High Elves, taking Swordmaster as their class, and Gamespy chose the Dark Elves and picked Sorceress.
One of the things that Gamespy commented on was the close proximity of the High Elf and Dark Elf starting areas to each other. They also noted that some of the newbie quests deliberately brought the two races together, within striking distance, giving players the choice to either scowl menacingly, or jump straight into PvP. There was unfortunately no mention of a meet-up and subsequent rumble with their noble High Elven counterparts though. Both teams ended their playtime by participating in a public quest, and you can read all about it from either IGN's or Gamespy's perspective.