Thank you everyone, it is always good to see reviews from people who actually ride specific paths, trails, or streets and then share their experience with others so they know what to expect or to look out for.
As for the person that commented about the bike paths being better on Kauai, yes for the most part that is true. There is a really good bike path system south of Kapaa and the Lydgate park. If you head up further north past Kapaa there is another really good beach side bike path (somewhat south of Anini). However, on the leeward side of Kauai and also most access roads to good biking areas, there is usually no shoulder at all and based on everything I have been reading about Oahu, there are very few bike lanes anywhere and bike riders have to share the road and often the lane with cars. Maybe that is why there is not so much bike riding on Oahu.
I must say that Maui is a very bike friendly island, well at least West Maui. I rode the West Mauil loop several times and many other areas around there and the roads were very wide, almost all of them with very good sized bike lanes. One really nice thing I noticed about passing through intersections with lights in West Maui is that there is no such thing as blinking yellow left turn lights. You know when both directions of traffic have a green light and drivers in the left lane get a yellow blinking giving them the okay to turn left with caution. Well that does not exist over there so when you go blasting through an intersection on a green light you do not have to worry about getting left hooked by some frothing at the mouth crazy that is trying to beat oncoming traffic to get their left turn in, putting your life in peril. Oh and add to all of that, all the bike lanes out there are very clean and well maintained. No broken glass, no rumble patches, ruts, potholes.
I sure wish Oahu could step up their game and make their streets safer for bike riders.