An authentic Hawaiian birth certificate for another Hawaiian individual has since surfaced which, using the same official form as the presumptive Obama certificate, includes an embossed official seal and an authoritative signature, coming through from the back. Obama's alleged certificate lacks those features, and the certificate number referencing the birth year has been blacked out, making it untraceable.
Obama birth certificate a forgery?
Even if Obama was not born in this country and is ineligible to run for President, I predict that this controversy will not derail his campaign. Any attempt to deny Obama his position on the ballot would result in rioting.
Also, the left savors the opportunity to flout yet another U.S. law. The left would rather win illegally than win legally. Electing an ineligible candidate would open the door to further violations of the constitution, including future elections of foreigners to high office. Electing the Kenyan Obama in 2008 would open the door for election of those who are more obviously foreign. One more element of U.S. sovereignty would disappear as we slowly merge into a one world government.
update - American Thinker posts more information, including forged copies on Obama's website.