WATCH: Harry Potter and the Half-Blood Prince!

So, the latest trailer for "Harry Potter and the Half-Blood Prince" has been released.  You can check it out below.  You also can click on and supersize the above poster, which still has the old release date on it.  The new release date, of course, is July 17, 2009, when Muggles everywhere will turn out in droves, clog traffic, wear funny hats and capes, cast spells that this will be the best Potter yet, etc.

In other words, expect mayhem on that date.

Will the movie live up to it?  That's for you to decide.

View the new international teaser trailer here: