Mooommmmm, Harry's keeping me up again!

I've spent the past week obsessing about Harry, what was going to happen in Book 6, then reading Book 6, and now trying to guess what will happen in Book 7.  And now I can't sleep, because I'm trying to figure out anagrams for new characters....or maybe it was all that caffiene at work...might be that too.
To start:
The only character with the initials R.A.B - at least RB - is Sirius' brother Regulus Black, who as far as I can remember, has a shady history with Voldemort, and ended up dying at his hand.   Lot we don't know about him, plus, in Book 5, there is a mention of a heavy locket that cannot be opened that is found while cleaning the house.  This definitely has to be the Horcrux in question..and then we find out Mundungus has stolen stuff from the house - it's gold, and shiny, so chances are good he's picked it up.
The locked door in the department of Mysteries + the vail that Sirius falls through are likely to mentioned in greater depth.  My guess is one of the Horcruxes is behind the locked door.  We've got the cup, the snake, and something of Griffyndoors/Ravenclaws to choose from.
I agree with Anne now, that Snape is definitely not on Voldemort's side - Dumbledore's last "Severus" could be taken as telling Snape not to give up his cover, Snape didn't actually hurt Harry, and he had plenty of opportunity to at least drag Harry back to Voldemort.  There is also his 'lifedebt' to James Potter that we may consider unfulfilled, perhaps part of why Dumbledore consistantly trusted Snape.  Anyway we look at it, we will definitely find out more about Snape in Book 7-->
I also really like this take on the prophecy, that JKR has stated was worded "very carefully":
The one with the power to vanquish the Dark Lord approaches
Born to those who have thrice defied him,
Born as the seventh month dies,
And the Dark Lord will mark him as his equal,
But he will have power the Dark Lord knows not
And either must die at the hand of the other
For neither can live while the other survives.
The one with the power to vanquish the Dark Lord will be born as the seventh month dies...
Now when you read this prophecy, it seems like it's only speaking about two people. HOWEVER, if you read a bit closer, it could possibly be about 3 people. My meaning:
-yes, Harry's parents defied Voldemort 3 times
-yes, Harry was born at the end of July
-and yes, Voldemort marked Harry as his equal
Here's where the third person comes in:
-'But HE will have the power the Dark Lord knows not' leading me to the meaning that HE is the 3rd person and this 3rd person may be the Half-Blood Prince.
-'And either must die at the hand of THE OTHER' meaning that 'THE OTHER' must kill Harry or Voldemort
-'For niether can live while THE OTHER survives' meaning that both Harry and Voldemort cannot live at the same time as 'THE OTHER'. It will have to be Harry or Voldemort who can live while 'THE OTHER' is alive.
--Laura from www.twwn.net

Ok, that was probably wayyy to much about Harry Potter in one sitting.  Maybe I can get to sleep now...