Just saw it half an hour ago.
Natalie Portman's performance is excellent; it's not her hair that I had a problem with, I'm just not use to seeing her onscreen and not in large, elaborate gowns. There is, however, a school-girl outfit she wore that got the audience really buzzing!
Hugo Weaving's performance is twice as amazing for the way he acts and emotes all behind a somewhat cheerie mustachio-mask and wide-brim black hat. Weaving's Smith was my favorite character from the Matrix movies, and he does the character of V justice, some irony intended.