Wow. It will be so awesome! I love the end. I'm pretty sure that the girl who's watching harry is Romilda Vane. In the book, she's in love with him and send him some special chocolates with a love potion. And it was Ron who ate them. You can see some great pictures of the movie at this adress: http://galeriehpprince.free.fr/index.php?cat=6 click on : photos non promotionnelles.

Harry Potter and the Half-Blood Prince
International Teaser Trailer
(1:33)