Oh yes, I was expecting JKR to redeem Snape in some way like that, and I'm glad it happened. Snape's love for Lily seemed a little on the creepy side at times, but just the fact that he absolutely went out of his way to protect her son (whom he definitely had no love for) because he knows she would've wanted it does show a very important side to him, and I wish that Voldemort could've known about that...that it wasn't Voldy that Snape was so loyal to, but Lily.

And Snape's sarcasm wins. XD