[retrokitten]

Per Mugglenet JKR has updated her site:

Section: Diary

JULY 18th

We are almost there! As launch night looms, let's all, please, ignore the misinformation popping up on the web and in the press on the plot of Harry Potter and the Deathly Hallows. I'd like to ask everyone who calls themselves a Potter fan to help preserve the secrecy of the plot for all those who are looking forward to reading the book at the same time on publication day. In a very short time you will know EVERYTHING!

Amen!

[Blue Eyes]

I'd like to ask everyone who calls themselves a Potter fan to help preserve the secrecy of the plot

Sounds like the plot might have leaked...

[EmilyGeiger]

I doubt that the hacker has the real ending anyway. Just a bunch of nuts who want to try to ruin the story.