I heard on the Dutch news that Jorge Zorreguieta won't be present at any of the official events, good thing IMO. He did accompany the royal flight to Buenos Aires, which was certainly not to everybody's satisfaction.
I saw on tv that the Dutch delegation just walked past a demonstration on the "angry mothers" (how are they called in English?) at the Plaza de Mayo, totally ignoring them. That's very rude, this could have been a good occasion to show that they do care about the atrocities that took place in Argentina, without necessarily insulting Máxima's father (if he's innocent like the Dutch RF says, what harm could be done?)
Despite these comments, I do believe this will be a successful state visit, it's not all about visting places of course, but also strengthening ties, and probably business contracts between the 2 countries.
I liked Máxima's look. Every hat seems to look good on her, she was dressed by Natan and Fabienne Delvigne, her outfit reminded me of...
http://www.theroyalforums.com/forums/attachment.php?attachmentid=39935&d=1094744772
http://img208.imageshack.us/my.php?image=apbelgianroyalsbg304fr.jpg