grindhouse doesn't qualify as noir, but i can't imagine that it wouldn't appeal to noir fans. i saw it in the back row at the second run four star with a jack daniels half pint in the cupholder and a crowd of seven, and i tell ya, that was a perfect movie going experience.

Laura (1944) comes to mind, and is particularly interesting if you watch it in tandem with Alfred Hitchcock's Vertigo (1958), as both films deal with a protagonist who falls in love with the image of a dead woman, but deal with the concept in starkly different ways. I also rather enjoyed A Pickup on South Street (1953), which I saw on AMC many years ago during a "Noir" themed festival they were doing, though I suppose one could argue against the film qualifying as noir.

Obviously, the old standbys like The Maltese Falcon, Double Indemnity, The Dark Passage, and Naked City are as good as ever. Then you have the post-modern descendant of noir, urban dystopia (usually displaced to the near future and labelled "cyberpunk), and films like Strange Days and Blade Runner.

I also enjoyed David Mamet's Heist (2001) quite a bit, and I would call that a modern noir film.