I'm sure if would be a great experience and very interesting but I was wondering the same as buildersmate - from an educational point of view I can't see much assistance other than showing an interest if you were thinking of going to law school there with a view to to practising (subject to the relevant state bar exam) in the US.
Is this it?
http://www.weblegaled.../new_york_vacation.pl
The actual details of what you get are certainly lacking on the website! If it's a vacation then it is out of normal semester session in the US? Just classes on bits of US law and advocacy for paying people and a bit of a jolly round NY?
If you are thinking of studying in the US then you may want to look very carefully at the costs associated, especially if you wanted to go to a highly rated school, and how realistic the opportunity to stay on and practice would be.