i also just returned from HBP... AHHHHHHHHHH!!!! i agree completely, hermione jean, let us dance and squeal together biggrin
i'd also like to guess the riddle, stereoblind! i'm going to say snape, and ive got most of it reasoned out:
I was the bane of Dark Wizards
Snape has been working against Voldy ever since Lily was threatened, and by playing his part to take down Voldy, he, in turn, would be taking down Dark Wizards by connection.
I was the head of the pack
He was Voldy's right hand man, his most trusted servant and unofficial head of the Death Eaters
Now I pace forth slowly
With a great weight on my back
Snape knows he has to kill Dumbledore, even thought he desperately doesn't want to.
Do not let my appearance fool you
He may appear to be a Dark Wizard, working for Voldy
Do not assume I am deaf
Various teahcers/students/othermagicalpeople ask questions and demand to know why he would do such things (i.e. kill dumbledore, serve voldy, etc.) alas, he gives no answer - but he does hear, and he does feel the burden of the accusations
And do not pity me because
I died a hero’s death.
he died at the hands of Voldy, but in his life he had done all he could to protect the son of the woman he loved.
i believe a new riddle is in order to celebrate the premier of HBP
of course the riddle would be about snape, he is the half blood prince after all!