The following is a stream of recent thought I've been having. Please comment, contradict, or agree as you wish.
For my 4e clonebreaker, I've been thinking of tweaking drow and eladrin. (Or rather, their non-IP-infringing analogues.) I've never made much of D&D's evil elves being black while its good elves are white, but recently I've been thinking it'd nevertheless be refreshing if 'shadow elves' were very pale skinned (possibly albino), while high elves are black (possibly drow-black). I don't intend to do any heavy-handed politicizing -- I like my high elves somewhat morally ambiguous, and my shadow elves not quite as cartoonishly evil as the drow.
One might wonder why albino shadow elves would get a bonus to Stealth checks -- which my shadow elves do -- but then, bone-white hair doesn't seem to make drow any more noticeable than sprite ninjas. In the dark, everything is black right? And then there are tigers, who manage to be natural ninjas despite being both very big and bright friggin' orange! And hey, pale human skin evolved in the real world to compensate for environments of limited sunlight, if one cares about such things.
It's a break with D&D tradition, but it's a tradition I'm not personally married to myself. This tweak might press some gamers' "Doesn't feel like 4e/D&D" button, though who knows how many? It's hard to tell how much default fluff is important to a gamer community.