It neglects to define Natural Born. But its Fourteenth Amendment (an integral, superseding part of the document, obsoleting whatever was left of Emmerich) declares anyone born on US soil not of diplomat or occupying military to be a US citizen by birth.
The Constitution also "neglects to define" the meaning of a person, Citizen, Liberty, free speech, the Press, and a plethora of other words and phrases. You won't mind then when we deprive you of any rights and benefits bestowed by the Constitution when it uses those words and phrases, because you already claim they have not been defined. Since Treason was not defined in the Constitution, why don't we convict you of a new definition of Treason, put you in Federal prison, and throw away the key, just to give a proper test to your theory? You'll then have plenty of time to practice on yourself the same anatomical recommendations you have made for other people.
In any case, poor Emmerich was resurrected from his musty, anonymous repose on this forum well after the issue was decided in 2008. Go find a post earlier than 11 Dec 2008!
The common meaning of Natural Born is Citizen by Birth. Obama's eligible. Period. Now, go make yourself useful in forming the 2012 case against him!