Read Salem's Lot by Stephen King and then watch the original two-part mini series. Do NOT, whatever you do, watch the new one from a few years ago. It's a complete joke.
Also, I just read The Historian by Elizabeth Kostova. It's, like, totally about vampires and Dracula, yo!
Shadow Of The Vampire (possibly my favourite)
Bram Stoker's Dracula
Horror Of Dracula
The Last Man On Earth (far more true to the book, from what I remember, adaptation of I Am Legend)
Lifeforce (vampires in space!!211)
From Dusk Till Dawn
Bordello of Blood
The Lost Boys
30 Days Of Night
Fair few I didn't see mentioned, turns out they're roughly in order from best to 'worst'.
Sunshine, by Robin McKinley, is a really good vampire book. Bit unusual, but she's a decent author.
And for truely awful vampire/Austen trash, try Mr Darcy, Vampire. It's by Amanda Grange, and it's almost painful to read but still quite fun...
The Vampire Diaries anyone?
EDIT: Ah, someone mentionned it.
Nightwatch and Daywatch (not that it's essentially about vampires, but they're present)... although, better read the books. When I saw the movies, I had the feeling that the directors had read them some time ago and had done everything by memory.
Anne Rice's books are fantastic.
This is, perhaps, a different category than the other ones you would have seen, but may I thoroughly recommend the children's TV series "Young Dracula". The title is trite, but I think it's brilliant, clever and funny. All the episodes are on Youtube ...
EDIT: Also, have you seen the original Buffy movie? Hilarious.