So, looks like the USA women will make the semi finals as either 1st or 2nd in the group, which of those likely to be determined by whether they beat South Africa (they should) and the goals scored/against for them and Argentine. In the semi finals though they'll face either The Netherlands (if they place 2nd) or Australia (if they place 1st), neither one is a matchup they're likely to win, even if they pull off a draw against them as they did against Argentine their relatively weak technical skills and inexperience will make winning the shoot-outs* exceedingly different.
Still, it's pretty amazing that they've gotten this far. They were probably estimated as the second weakest team in the group behind England and Germany.
*1 player vs keeper, player starts at 23m from the goal and has 8 seconds to score a goal.