I always wanted the US to go through, to expand the game and perhaps spark interest in it in America; doesn't do you any good to be playing silly games noone else plays. That's what the olympics are for.
America has a good chance simply because of the route they have ahead, getting to the semi-finals has a quite high posibility, you just need to beat Ghana and then either Uruguay or South Korea to get there. At this point though you are forced to play either Argentina, England or Germany (unless Mexico make it by Argentina). I couldn't tell you who'd await in the finals though. The three big boys Brazil, Portugal and Spain will compete for that, along with the 4th best team the Netherlands, and a few unfortunate teams. In a way we're lucky they're going to all knock eachother out.