Over on her eponymous blog, Lady Theresa Christina has assessed Light Yagami's morality from the point of view of her Christian faith.
Naturally he doesn't do well under such a microscope. Kira might think himself God of this New World, but the Christian God has his own Views on the worship of deities other than Himself and they didn't include any mention of young Mr Yagami.
Lady Theresa Christina doesn't just state the obvious here. She digs down into why Kira's hubris is unacceptable within a Christian world-view. A short and sweet article, but worth a glance, if you're as fascinated as I am by the theology, philosophy and/or ethical standpoint of the stories.
Coming from a similar place - theologically speaking - The Eternal Optimist blogger Anna Streetman also explores the Christian values in Death Note. Her piece (Death Note: An Anti-Religion Anime?) broadens the scope a bit to include many different themes running as an undercurrent through the story.
Most of all, she discerns a thread warning of the dangers of blind faith. Particularly when your deity is a serial killer.
I thoroughly enjoyed reading that one.