Announcing the Lego Vampyre Castle - It is, in a word, AWESOME. The pic on their site oddly does not do it justice, even when you roll the cursor over the pic to get a close up look, so I am stealing the pic my friend Arielle took of hers at her house to show you. The figurines that come with it are quite fang-tastic too. All for $99.
That hyper link also shows all kinds of things you can add, like a Hearse or a group of ZOMBIES!
On September 1 keep your eye out for the Lego Haunted House.... It may be a Lego store exclusive. At the bottom left of that link there's a box where you can type in your town or zip code to find a Lego store near you.
TIP: It's never too early to begin buying for the holidays - or birthdays - but this could be a perfect activity (or simply as decor) for Halloween festivities at school or home!