This is a wonderful essay on Snape and his transformation throughout the 7 books. Well, really its his transformation throughout his entire life. It is eloquently written and shows such depth of thought...I absolutely agree with the author, they have done a fabulous job.
It does include spoilers to Deathly Hallows, so if you haven't finished the book yet, wait to read this or it won't make sense.
Enjoy! I certainly did.
http://rexluscus.livejournal.com/254445.html?page=1&style=mine&view=2829\293#comments