Sirius, or so I'm told. Let's hope JK Rowling deals with this character death better than she did in the fourth book.
(My money's on Dumbledor dying in the sixth)
Yep, it was Sirius but it was all over very quickly and not as emotional as I thought it would be. I reckon Harry will die (or maybe kill himself to end it all?????) as she herself suggested in her interview last week (although her red herrings are as famous as her writing now) - if she doesn't it will dog her all her life with requests to keep it going until it runs out of steam and everyone hates it (big brother anyone...) :)