There was the same (well, not the same, but the same kind of idea) lunatic fringe during the G.W. Bush era. Lest we forget the 9/11 "truthers." The problem with the lunatic fringe (from whichever side of the political spectrum) is that they never focus on the constructive issues. They have to find the most outlandish, conspiracy-laden theories they can drum up because the real world isn't scary enough for them.
On the plus side, while there's a lot of sound and fury over the "birther" issue it really does signify nothing...or at least not much. Most polling has indicated that the significant majority of Americans in general believe Obama is a citizen. While nearly half of Republicans in specific "have doubts." I don't disagree with Obama's decision to show the long-form certificate, I just shake my head at the fact that the only people he "needed" to show it for are people that were never going to vote for him no matter what he did, unless he managed to get a melanin-removal procedure and a legal name-change to "Barry O'Ballmer." Oh, and Jesus Christ descended from the heavens to show the media his "certificate of Christianity."
I can only hope this bites the Republicans in the ass (in terms of independent votes gathered) as badly as some are fearing it will in 2012.
I am a physician and in addition to my own, have seen many real Birth Certificates. I believe that which Obama is now showing America is no better "proof" of his legal right to be President than the previous "Certificate of live birth" that he flapped around previously. Until Obama demonstrates to all Americans a genuine interest to prove that he has the legal right to be our President, Obama is nothing but a great charlatan, a hokes of the first degree, and an ILLEGAL ALIEN living in our White House.