Me and my friends have discussed Skyrim multiplayer so much! Don't think of it like WoW or Runescape or any of those MMORPG's, think of it like your game (that you're running around playing) being a lobby, of sorts. You can connect to Xbox live (or the internet for PC) and invite a friend to your game, and then just wander around, do quests, kill stuff, w/e you want, together. So there wouldn't be any randomers from china gold farming the dragons
or the low-levels losing out to high-levels. and any RWT would be pointless unless you're some spolitfag who wants to buy everything. But you could pause the game if you're stuck on some really hard boss/monster/quest, invite a friend who might then have to trek across the map to get to you, and then you kill it together or something. But like other games that have slow down time specials you wouldn't be able to use them in a multiplayer version. But then how would your inventory work? because at the moment it stops the game to open your inventory.. Maybe they could bring back the old hotkeys in Oblivion, or just leave you vulnerable while you look at your stuff...
An optional multiplayer feature would be nice; as great and immersive as the game is, playing for a few hours on-end can get a little lonely lol