Nice design! I liked it the moment I say it -- very original! You Brazilian designers really have a knack for the original. Anyway, the one thing you might work on is the two black bars on the left -- lighten them or something because they really detract from the smooth design. And maybe make the logo a little bigger so that it stands out. Great job overall!
tho a little 'too much happening' below midpage for me.. as a 'surfer' i like to know what the site is, that im looking at, without having to look, but i suppose that reasoning depends on your traffic type.
graphically... design is great... but as i think about over all site performance.. i think you should reduce the useage of images.. you have used too much images.