I still can't quote properly...
"I always new Snape was evil. Seems that Harry, Ron, Lupin, Sirius, and James had the right idea about old Snivellus. It is a shame Dumbledore is such a trusting man."
I think that, quite on accident, you've made a case against yourself here. I adore Ron, he is without a doubt my favorite character, but, really, when has Ron EVER been right about ANYTHING? Always thought Snape was evil, always was wrong. I feel this trend will most likely continue through the end of the books.
Also, can anyone see a final scene playing out where at the very last second, Snape jumps into the fight with Harry and helps him defeat Voldemort? I think that's why it's so important for Snape to remain a spy, and why Dumbledore offered his life up instead of Snape's (don't forget, Snape could have died for the cause, by simply not killing DD and breaking the vow), but DD saw the importance of having somebody at the fight scene to support Harry. I fully expect Snape to die on the end helping Harry...Or then again, maybe he is just an evil twit. Thoughts?