Wow that game was tense for 60-odd mins! The AB's deserved to win, but they certainly didn't make it easy for themselves (though Argentina does deserve a lot of credit for their strong defense). I actually felt the score fairly reflected the game - the AB's dominated territory and possession for much of the game, and they had a number of other try scoring chances throughout the game that they missed by a matter of centimeters.
The AB's scrum was strong (as usual), and I was very happy with the AB's lineout. The AB's lineout has been an issue in previous years, but has been outstanding this tournament. The AB's won all of their own ball, and managed to steal a number of Argentina's lineouts (Sam Whitelock was very impressive here). I thought Brad Thorn had a strong game, which was good to see as he has been pretty quiet this year. Kaino was again impressive (though perhaps not as impressive as he was in the 4 previous games), while McCaw and Read both played ok, but are certainly both not at their best (both missed tackles in the lead up to Argentina's try too).
I'm really glad to see that people in this forum have picked up the slowness of Weepu's delivery - I ended up yelling at the TV as I was so frustrated at his habit of continually slowing the game down. The commentators continually praised him for the way he controlled the game, but when you have a 3 on 1 overlap outwide, and the opposition defenders are still retreating into position GET THE BALL OUT WIDE IMMEDIATELY! His goal-kicking was brilliant though, and his box-kicking was generally pretty accurate (though I think he did put one out on the full). I would certainly start him versus Australia, but he really just needs to pass the ball out immediately at times (one of the few things that Andy Ellis does well). Slade looked to be struggling (even before he injured his groin), and his groin injury doesn't look good. Cruden was ok when he came on - he wasn't a lot better than Slade, but he did enough to convince me he will do a good enough job if required. Whoever plays 10 doesn't actually need to do a lot though, they just need to distribute the ball well to the backs - anything else they can add is a bonus.
Nonu was a bit mixed - he looked dangerous, but he did make a few errors. Smith did a good job (as usual), while SBW did a pretty good job on the wing too (though I'd certainly like to have Kahui back next week). Muliaina was very quiet in what looks to be his final AB's game, as his injury was apparently quite serious. Toeava was pretty quiet himself, but he does have a wonderful long pass (of either hand), which did create a few opportunities out wide. Hopefully Israel Dagg is back next week, as they could really use his spark from the back. Cory Jane was man of the match for me. He was almost impossible to bring down, and he must have the best left-hand fend in world rugby.