As fresh member, first of all a warm "Hi there!" to everybody and a great big "Thanks!" to L-E for subbing the NANA Anime *and* Movie!
I'm fan of the Manga every since it started being being released here in Germany about a half a year ago, we're at volume 7 now - I've read they past volume 15 in Japan by now, and no end is in sight - Ai Yazawa's longest series, so far. Anyway, I may be able to provide some details on the differences between manga<->movie<->anime - feel free to ask me about the manga as much as you want ^_^
So far I can tell you the movie covers volumes 1 to 4.5 so the manga story goes far beyond the ending of the movie. 4.5, you may wonder? Well the movie ends right in the middle of the volume - that scene is simply continued in the manga, without any fade or cut xD.
So far, I love the anime-adaption - I'm surprised how close they're adapting the style and scenes as they come in the manga - the partial lack of animation is acceptable, in my eyes - to add more animation, they would have to probably simplify the character-design more, taking away the special flair of Ai Yazawa style.
After seeing Paradise Kiss, another anime to an Ai Yazawa manga, I'm really satisfied with NANA - in ParaKiss they often placed close-ups on more-or-less random objects during conversations to avoid animating *anything* ::laughs::
Oh yeah, and Ep2 was a big surprise - I didn't think they'd roll up Hachi's (Nana K. ) past as detailed as in the manga. By the way, Ep2 was the content of the first chapters of NANA ^^ This is how everything starts in the manga. If they keep on like this, we'll see NANA O.'s past next up.
To L-E - I hope you're prepared for a long series XD Seeing the pace of the anime, this adaption is taking it's time and hardly skips any content of the manga (which is wonderful to see, for a fan like me xD) - Right now it's 2-3 episodes per volume, I'd estimate ^^