We were there. The last Harry Potter Party. We went to the Grand Hallows Ball at Borders to say goodbye to Harry and his friends. My son is now the age Harry was when he entered Hogwarts for the first time. I started reading the books with my daughter when she was about eight. I loved them as much as she did. Now she is thirteen and she was slightly embarrassed to be there. But most of the kids in line were her age or older, and she'd read the entire book by Saturday night. She then stalked me until I finished it so she could discuss the ending.
I hope J.K. Rowling decides to create more books. But I also hope she doesn't. It will be hard to transfer loyalties to other characters, but it will be even harder to give up the magic in the books. Here are some pictures of the night and my own little Harry Potter, complete with face-painted lightning scar.