The State of Hawaii is obliged by its own laws (Hawaiian Uniform Information Practices Act --UIPA, their answer to FOIA) to release that documentation. Of course, the "Right Wing" broadcasters know that, and have ample means to take it to court in Hawaii.
Your real questions might better be expressed by, "Why has not one conservative talk show host hired a lawyer to sue for release of those documents, pursuant to the Hawaiian UIPA Statutes?" and "Has one (1) of them contributed to the Writ of Quo Warranto actions underway in Washington, DC?" The answers are "No," and "No." In fact, none of them (not 1) has even accurately reported on the legal aspects and actions of the issue.
I wouldn't punish myself over those unasked questions. After all, not one (1) elected Republican Representative has asked the state of Hawaii for documentation, either. Or brought up the issue of whether or not Obama holds "Natural Born Citizenship."
Several have personally replied to my query by telling me that, "Obama has posted his Birth Certificate." Or, "He was born in Hawaii, and is therefore eligible." The Republicans have chosen to ignore the "Natural Born Citizen" requirement of Article II. They simply reiterate Obama's claim that he is eligible as an Hawaiian "Native Born Citizen," as if the matter of a father who was a British Subject is of absolutely no Constitutional concern.
The "Birthers," much to Obama's delight, have concentrated on the "WHERE." Theoretically important, this has allowed Obama to obfuscate the "HOW," and the "BY WHOM."
Bottom line: This Obama is your de facto President until 2012. The trick is to make sure that he, or no one else like him, does it again. Not so easy, when Team Obama plays Chess, and the opposition is having a hard time with Checkers.
I honestly hope the Special Investigations against Obama right now look into this as well while they are also pursuing the voter fraud practices of job placement Obama participated in.
Of which is a felony.