It is speculated to be released on 7/7/07.
around mid-2007 supposedly. hasnt been scheduled for release yet though.
you can check jkrowlings website. but from what i heard and read the book is due on 7-7-07 but the movie will be out on 7-13-07 and if the book is released on 7-7-07 there will be a media frenzy.
should be July 7th, but date may change
My sis is a major Harry Potter maniac and she says that next year, around the same time when the fifth movie's out, the last book will come out as well. that's what she says.
we'll both see if she's right:)
Many think (or hope) it is going to be July 7th of 2007. JK Rowling herself said that is what she is AIMING (big emphasis there) for, but there is not an official release date. The book has not even been published yet. Let's keep our fingers crossed its real soon!