I like the idea of setting up an account with an agency, that way people can go through them. There is a good article in Modern Bride about registries gone wild and people asking for money, etc.... One person set up an account and had different things they wanted to do on their trip and how much each costed, that way people could pay for one of their activities, like a tour, admission to the park, etc... and then they sent their guests photos of them doing whatever activity is was that the particualr guest paid for with their thank yous. I thought it was a neat idea.