Here's a synopsis of the movie:
Voldemort is tightening his grip on both the Muggle and wizarding worlds and Hogwarts is no longer the safe haven it once was. Harry suspects that dangers may even lie within the castle, but Dumbledore is more intent upon preparing him for the final battle that he knows is fast approaching. Together they work to find the key to unlock Voldemort’s defenses and, to this end, Dumbledore recruits his old friend and colleague, the well-connected and unsuspecting bon vivant Professor Horace Slughorn, whom he believes holds crucial information. Meanwhile, the students are under attack from a very different adversary as teenage hormones rage across the ramparts. Harry finds himself more and more drawn to Ginny, but so is Dean Thomas. And Lavender Brown has decided that Ron is the one for her, only she hadn’t counted on Romilda Vane’s chocolates! And then there’s Hermione, simmering with jealousy but determined not to show her feelings. As romance blossoms, one student remains aloof. He is determined to make his mark, albeit a dark one. Love is in the air, but tragedy lies ahead and Hogwarts may never be the same again.
If you click on the link and watch it in HD instead the quality is amazing.
I used to really enjoy Harry Potter movies, but interest in it lessened as I grew up, or perhaps the movies just became less interesting than what I expected from reading the books.
Although it started out as a movie for children (just look back and watch The Philosopher's Stone!) this movie is rated PG. The movie's definitely darker and more epic this time, but I'm not complaining. They need to do something to bring the audience back.
According to the GSC website, Harry Potter and the Half-Blood Prince is due to be released on 16 July 2009.