Jennifer Connolly as Izumi Curtis! ^__^ Yeah, I went to see Dark Water yesterday, and despite the fact that the movie sucked, I couldn't help but notice Jennifer's awesome resemblance to Izumi. So there ya go!
And I also had a different thought to one of the other actor suggestions, because in my humble opinion, it would be:
Uma Thurman as Riza Hawkeye! ^_^ My friend and I have actually been discussing that for a while. I think she'd be a kick-ass Riza! Cameron Diaz would strike me more as a Winry than a Riza...
So that's my little analysis. Hope you enjoyed! xD