Harry Potter and the Deathly Hallows

I just received my book in the mail today. I've read the first few chapter but I've had this thought mulling in my mind since I talk with my dad yesterday about Harry Potter and what would happen in the last book. So I wanted to write it down or tell someone...yeah...about it before I finished the book, just in case I'm actually right for once (hah!). Anyway I promise you that I haven't read the back of the book or anything. I'm actually on page 90 in the U.S. Edition if that tells you anything. I believe that Dumbledore is still alive, because, as we saw in the Order of the Phoenix, Dumbledore himself turned into a phoniex and vanished. And as we all know, phoenixes are reborn from their ashes. So if Dumbledore is a phoenix or can turn into one, who's to say that he can't still be alive?? And Dumbledore always trusted Snape and repeatedly made that clear, so if he's still alive, who's to say that Snape is bad? Basically it falls out like this: Dumbledore is still alive, and Snape is good. That is what I believe. Now whether it's true or not, I've yet to find out. I'm a slow reader and I'm going on vaction soon so hopefully I'll be done by next week...hopefully.
-Ryann