I wondered about that also. In my alluded to discussions, the broker at first told me that US citizens and by implication US investment houses could not buy in but after checking with the investment banker that is running the show for this particular syndicate member, he came back with information to the affirmative.

Teutracker who has looked into participating told me the same thing. In fact, even though he is a Canadian citizen, he was told if he wanted in, he would have to do so through Macquarie, USA.