I saw the film and rather enjoyed it. However, I totally feel Alan Moore's complaints are valid and the ending negates the whole point he was selling with his graphic novel. That said, this is a movie and if it works cinematically, then source material be damned. Peter Benchley knew this when they made Jaws, why can't Alan Moore accept this?
Hugo Weaving was on his game, so was Portman, but it was Stephen Rea and his performance as Inspector Finch that really sold the film (in my opinion). There's not really a weak link there. I think the Portman jail sequence and Finch recounting his "feelings" to a montage of current events are the most memorable, which makes me raise my eyebrow to the fact that the Wachowski Bros. felt they had to do the whole solidarity stand thing at the end.
This was my first listen to foriegn composer Dario Marianelli, and his score is pretty great. I'll definitely be keeping an eye out on his other scores in the near future.
At any rate, good flick. And someone give William Hurt more work, please.
