The standard split between Light & Dark Elves has always been around, though it has been used differently.
D&D is the most classic example: the pale standard elves akin to Light Elves; and the jet-black, underground dwelling drow akin to Dark Elves. This seems to be very common and very popular: both sorts of elves pop up in Everquest (actually, it seems to be more of a mix of Warhammer factions & D&D appearances).
Warhammer & Dragonlance use the Light/Dark theme, but use it solely for a good/evil reference, and not for a combination of attitude and appearance.
Or, the basic split sort of remains, but is played around with. The best example that comes to mind is Warcraft elves: the thin, pale, pointy-eared human-like Elves; and the bluish-purplish-skinned Night Elves.
I don't mind the use of dark elves, but I do mind when they're treated as something much more powerful (&/or evil) than regular elves. It's one of the reasons why I don't use subraces IMC: sure you can have a elf with a drow-like appearance, but that elf is statistically the same as the elf in the race presented in the PHB (same thing for duergar-looking dwarves, too).