Here is a Bishop page on The Mauloa Canoe --- made out of a single koa tree, and "lashed with coconut cordage"...
Here's a Bishop exhibit on Voyaging Provisions.
And here is a page called Plants of the Past -- a Bishop Museum exhibit on what plants the ancient Hawaiians brought with them to Hawaii.
The Hawaii Nation organization has put together a wonderful, award-winning page called The 24 Canoe Plants of Ancient Hawaii. Check it out.
This page on Hawaiian/Polynesian Facts lists at least 16 different ways the coconut and coconut palm were used in Old Hawaii.