I'd be interested in this. 

As far as setup goes, I personally prefer to play just one character. 

I think we should be playing under the same house, but I think with dark elves that doesn't necessarily mean we would be cooperating. Of course if an external threat appeared, House pride would trump petty conflicts. 

Coming from another dimension, or maybe an overlapping plane would be cool, or else living under ground like the drow. They would be a sort of myth or boogeyman for people of the material plane, or the surface world, depending on which way we would go.