Oahu overview from Tripadvisor (including photos and videos)
Oahu Photos
An excellent listing from Wizardpub.com of all resorts and condos in Waikiki, with a table of features and aerial photos. The prices indicated would probably be unrealistically high now, due to the economy
Flight/Hotel package deals through Hawaiian Airlines - June 11-15
From Tripadvisor - things to do in and around Honolulu, with traveller reviews and comments
From Tripadvisor - things to do in Oahu, with traveller reviews and comments (overlaps a lot with Honolulu listing)
Frommers - Oahu Attractions
Frommers - Oahu - especially for kids
USS Arizona Memorial (Pearl Harbor), including traveller comments
Best things you've ever done on Oahu - From Tripadvisor forum
Hawaiian Fire Surf School - with reviews
Climbing up Diamond Head
Hawaii Food Tours - gets great reviews!
Iolani Palace - the only royal palace anywhere in the USA
Homepage for 'The Bus' - Honolulu County's excellent, ubiquitous and cheap public transport system
A clickable map of Oahu - info about many regions