
I've started putting together some useful resources on things to do and see in Hawaii. It's not finished yet, I'll add more in the next few days. Comments welcome!
Here is what looks to be a decent listing of possible things to do and see on each Island:
Clickable map of the Hawaiian Islands
Hawaiian Airlines homepage
Hawaii Superferry (Honolulu-Maui)
Some activities for kids in Hawaii
Grocery shopping tips - join their membership scheme for discounts at Safeway etc
Safeway stores near Waikiki
Tipping guide for USA
Momsview - coupons for discounts on all kinds of things. Alamo Car Rental and many many others.
Royal Elephant.com - Comprehensive Hawaii travel site
Below is a series of links to the resources I have pulled together, sorted by Island
3G Cellphone coverage map for USA, including Hawaii
VRBO.com - Vacation Rentals by Owner. The leading site where condo owners advertise their property for rental. You can sort by island, town, and by the complex the condo is located in.
Homeway.com Hawaii vacation rentals - another site for condos
Hawaiigaga.com - a good search engine that finds condos and other accommodation, wherever it is listed on the web
Wizardpub.com - provides an aerial photo, traveller reviews and brief details of practically all accommodations in Hawaii, sorted by island
Tripadvisor now has separate listings (with reviews) for 'vacation rentals' (i.e. condos) as well as hotels. Good advanced search features. Here is the main Hawaii vacation rentals page. From there you can drill down by city as well as by island
Travel-Hawaii.com has a good 'hotel finder' tool