JK Rowling has updated the FAQ section as well as answering the most recent poll question on her site. Some things discussed in the FAQ section covers people who cannot apparate or disapparate inside Hogwarts, the twin’s names as well as saying that she would be killing off additional characters in upcoming books.
Answer to most recent poll question & some FAQ answers:What did Dumbledore's Howler to Aunt Petunia mean? ('Remember my last'?)
Now let the speculation begin, and mind you type clearly, I'll be watching…
Update: Rowling later added the following:
P.S. It has been suggested that I am wrong in saying that Dumbledore's last letter was the one he left on the doorstep with baby Harry, and that he has sent a letter since then concerning Harry's illegal flight to school. However, both Dumbledore and I differentiate between letters sent to the Dursleys as a couple, and messages directed to Petunia ALONE. And that's my final word on the subject - though I doubt it will be yours :)
Are you going to kill any more characters?
Will there be two chapters in the sixth book called 'Lupin's Papers' and 'The Lovegoods in Court'?
No, that's another pile of Storgé, I'm afraid.
J.K. Rowling has also updated the "Rubbish" section denying that Harry Potter is based on her cousin (thanks Maria).