I heard about this from The North Orange County Harry Potter Meetup Group:

Scholastic has announced that seven lucky U.S. Harry Potter fans, under the age of 21, will be selected in a sweepstakes and flown to London to join J.K. Rowling at a midnight launch event for Harry Potter and the Deathly Hallows leading up to the book release at 12:01 a.m. on July 21, 2007.

The winners will attend “J.K. Rowling and the Moonlight Signing” at London’s Natural History Museum and will join 1,700 fans who will have the opportunity to meet J.K. Rowling and have their book signed. They will also be among the lucky 500 fans who will be selected to attend a midnight reading with their favorite author. The Scholastic sweepstakes winners will be given a copy of the U.S. edition of the book.

But hurry: Entries must be received by June 15, 2007.

For more information: www.scholastic.com/harrypotter/events/sweepstakes.htm