Love that poster! Didn't like the movie so much though.
Ari, that's a good question re the meaning of 'Grindhouse' these days. I guess technically it should refer to any B-grade, low-budget, porno or exploitational movie shown in low-rent US theatres in the 70's. A decent enough definition is on wikipedia -
http://en.wikipedia.org/wiki/GrindhouseBut with the revival of the genre, I personally think its useful to include more recent efforts that have the same spirit. The wikipedia entry has a good definition... "Grindhouse films characteristically contain large amounts of sex, violence or bizarre subject matter."
... and I guess that's as good a definition as any?