Sorry, Glyph, I meant that 'evil Paladins' are know known as 'Blackguards'. Personally, I can't stand the idea of Paladins (or at least the word, Paladin) being 'evil'. Holy Warriors of other alignments, right down to similar power sets? Yes, I'm totally cool with that, just don't call 'em Paladins, cuz you'll actually confuse people.
My two bits on it. Then again, I am biased because I like Paladins. I once had a Paladin who loved 'evil' looking armour, and the fear he generated because of his choice of fashion he accepted as punishment for his vanity. Not to mention he had a REAL Nightmare as a loyal mount (who was Lawful Good, which according to the 3.5 Monster Manual, when it says "Always Evil" under Alignment, it can mean up to 90% of that Monster type IS Evil, but not all. So this Female Nightmare was Lawful Good due to some sort of experience that she wouldn't tell anyone. ...I blame Planescape: Torment. Even after all these years.)