We had never seen this one, but The Husband picked up a copy of The Horror of Dracula this year. It was fun to see Christopher Lee and Peter Cushing in this familiar story.
This one is online at DailyMotion.:
Horror Of Dracula by crazedigitalmovies
Moria calls it "the cornerstone of the Hammer Films legend." MSN has an overview.
1/4/2009: 1001 Flicks has a review.