Everyone begin the countdown...

From J.K Rowling Official Site:

"Harry Potter and the Deathly Hallows will be published on Saturday 21st July 2007 at 00:01 BST in the UK and at 00:01 in the USA. It will also be released at 00:01 BST on Saturday 21st July in other English speaking countries around the world."

Other info can be seen at:
Borders
Barnes and Noble
Amazon
The Leaky Cauldron

Just me (waiting for 21 July),
Fran =)