Against my better judgement...
I have engaged Stephen Law over at his blog. He has a delightfully entertaining thought experiment going called "The God of Eth" in which he considered the possibility of God being "all evil". He then goes on to use the same arguments the theists use to support their "good God" hypothesis to support his hypothesis. He feels the evil God concept can be equally supported using traditional arguments for an all good God, therefore if one feels an all evil God is ridiculous, then the same should be true for the idea of an all good God.
Obviously I disagree with him. You can see my initial response here and the continuation of our discourse here.
I predict I will be put to shame fairly quick as Stephen (and probably many of his visitors) is a respected philosopher in his field and I'm just some schmuck art major from Minnesota. Either way it's an interesting conversation that hopefully will progress my thoughts on this issue.