Let the Right One In is, quite possibly, one of the best vampire movies ever made. I imagine it will be remade with Zac Ephron or some motherfucker from The Suite Life in a few years and it will be completely ruined.
Tomas Alfredson and John Ajvide Lindqvist have put together a well made, well written, and at times genuinely creepy vampire/coming of age/revenge movie. There's a lot going on in Let the Right One In and to go into any of it would ruin the impact of the movie.
This is available on Netflix download so most of you fine folks have absolutely have no excuse to miss this movie.