This topic came up in our gaming group a while back. I was aware of the parenthetic alignment she had in earlier editions, but since I like the idea of a non-evil god of death, that doesn't bother me.
The most interesting thing that came out of our discussion was actually the result of a minor misreading of something in the PH. Basically, it says that all Neutral Clerics of Wee Jas use negative energy to rebuke, etc. undead. We missed the "Neutral" part of that, and extended the idea to a Paladin of Wee Jas who could rebuke undead and cause wounds.
Personally, I really like the image, and would allow it in my game. Then again, I think the idea that energy from the negative plane is inherently evil and energy from the positive plane is inherently good is... um... not real great.