Oh, boy. Yeeaaah, this is pretty much the latest reply to a comment pretty much EVAR. Er, I'm trying to get caught up?? ::headdesk:: Well, even though it's ridiculously late, I wanted to let you know that I appreciated your comment.
I really think that, had Sirius lived long enough to find out that Dumbledore was sending Harry off to look for the Horcruxes, he'd have had a fit! There's no way he'd leave that to Harry.
Sirius needed to grow up a lot... and so did Severus. I like to explore the idea that they could actually help each other with that. Overcoming their old grudges is a big step.