Looks like this has been made canon...
On Friday there will be an Epic Destiny preview from Arcane Power called the Archlich. Whether this means a Baelnorn that isn't necessarily Elven, but still not evil, or something else, we'll see.
But it means that now Wizards are letting you play Liches (albeit, Epic ones) in the official rules.
D&D Home Page - What Monster Are You? - D&D Compendium
D&D Home Page - What Class Are You? - Build A Character - D&D Compendium
Rule (1) of Roleplaying: There is always a player who wants to be a werewolf / vampire / lich / demon / dragon.
Rule (2) of Roleplaying: If they get their way, no good will ever come of it.
Rule (3) of Roleplaying: They will tell the story of it the rest of their life, and every time they do, they will start the story with, "So, in this one game, I tricked my DM into letting me be a..." and they will end the story with, "... and so the game was pretty stupid after that, but how cool was my character?"
sometimes, having a PC turned over to DM as an NPC can be a desirable event...
hey iv noticed a lot of people have been saying that liches are just straight forward evil no matter what. while i dnt know about the rules about it in d&d in the lore it simply say that only a very evil soccer would chose to become one. which might mean that a good person could become one and possibly hang on to the goodness in them; of course they would more than likely go mad either from never being able to die or some form of corruption from the orginal transformation. just a thought.