looks like an awesome layout!! best of luck on it!
What's the roof over the dining made out of?
be careful with what you use - i can attest that living in florida, you don't want any sort of clear material - during the warmer months (well hell, u live in hawaii, its not like there's that much cooler

) you won't be able to use the table past about 7 am until dusk, it will just be too hot. not to mention the fact that it will seriously warm your house because of it. some of the better plans i've seen for a dining room area are either wood, w/ the beams exposed - makes for a great homey feel for the room, or copper - very classy, but not too overstated.
edit, realized one other thing, just a suggestion of course
in the kitchen, you might want to put an island - i don't know how much you cook or anything, but i know how nice they can be for the extra counter space and extra sink if u put one in it. the way i see that you could do that would be to push the southern countertop out a few feet. it would seem to work because the entrance way seems to take a turn and has some extra space there. not sure if it would work of course, but just a suggestion
