Never read them, but I've heard quite a bit about them from the members on a SFF forum I'm active on. I'm thinking of buying as many of his books as I can when I've got the money.

Oh, and this might interest you - someone's making a film about Lovecraft called Cthulhu. There's also a J. J. Abrams film with the project name Cloverfield coming out in January that is rumoured to be about the awakening of Great Cthulhu.

http://cthulhuthemovie.com/
http://en.wikipedia.org/wiki/Cloverfield