no never played it before my main mmo's were ffxi and warhammer.

as for segregation server to server take diablo3 they are keeping hardcore and regular mode on same servers. only difference will be they both have separate auction houses to use. that would be awesome if they can somehow combine multiple types of styles of game play and layer then into the same servers so we can play together for alot of the content still in some form or fashion. or at the very least still chat and emote each other.