Unfortunately I didn't get to meet digigarden on my trip but I can contribute some pictures now at least!
A shell ginger of some kind-
Unknown Palm-
I believe Pandanus tectorius- Hala
1-bird of paradise, used as ornamental
2-not sure if this is a chinese fan palm or something else but i'm sure i've seen it before.
3-pandanus in DR is supposed to be Pandanus odoratissimus but hey...