There's an awesome 1080p trailer for it here:
http://movies.yahoo.com/movie/1809838857/info I was a huge fan of
Sin City and I'm looking forward to this one as well. The dialogue was a bit cheesy in that as well, but it's all part of the whole film noir/pulp fiction schtick anyway, it's not like this is a Brett Ratner movie or something. Also there look to be some pretty slick action sequences. Eva Mendes, Scarlett Johansson, and Jaime King don't hurt either.
