This page:

http://www.fvza.org/askdrp.html

features a chap called Doug from Terre Haute, Indiana asking:

"I saw a guy on MTV who said this whole thing was made up as part of a movie. Is that true?"
  
which suggests that perhaps this site is some clever viral marketing for a film. Does anyone know of any modern day vampire movies in production?

If you like this idea, you'll probably like the British mini-series "Ultraviolet" which was based on much the same premise. See http://www.imdb.com/Title?0169501

One of my favourite pieces of TV ever...

Uh, HenBen, they mention the movie explicitly on that same page. It's "Underworld" -- http://imdb.com/Title?0320691

This is the general idea behind the "Anita Blake, Vampire Killer series, by Laurell Hamilton