Also, has anyone found any mechanical difference between the two so called Drow "sub-races", Lolth-sworn and Seldarine ? I didn't see any. I don't think it's a good idea to differentiate between two sub-races if ... there is no difference.
I hope this is not a way for the engine to get some tags out of our character (like "good" or "evil" Drow). There are better ways to do that than creating a whole new "(sub-)race". Race and beliefs are not the same thing.
Because then ... what happens if a Lolth-sworn Drow (proper Lolth worshipper, not follower of Vhaeraun living in a standard Drow city) stops following Lolth and turns to, say, Shar, or Mielikki, or Corellon (I doubt he'd accept but anyway). Do characters change race when they change god ?