I'm very excited to see so many people willing to help with Haiti. I have a friend (there now) who has made 15 trips to the island to help in various ways.
Sorry to say I see hammocks as having limited benefit in Haiti. A nurse friend of mine just returned and here are her photos: http://www.kodakgallery.com/gallery/...3%3A1648254605
The 11th pic in the slide show is the first one showing the grounds of an orphanage they were at. It's typical of other compounds I've seen; walled and very few trees.
The Haitians get good use out of poly tarps as these can be used to create tent cities with minimal additional resources. But installing sturdy posts in the ground to support many hammocks involves resources they may not have. They may also be tempted to attach hammocks to block walls that aren't strong enough.
A hammock is mostly a place to sleep comfortably but a tarp provides shelter for activities of daily life. Poly tarps are one of the most requested items right now.
I was hesitant to write this because of all the enthusiasm here but felt these points should be considered.