The LA Times (via the Denver Post) visits Oahu's 10 top "other" strips of sand, including (of course) Kailua and Lanikai Beaches.
Sadly, the writer has no clue as to geography, as she calls the "From Here to Eternity" beach "the Halona Blowhole", which is actually miles away. Other than that, there is some good info...
http://www.denverpost.com/travel/ci_9099214