Neither do I.
However, there was a similar thread yesterday with dozens of FReepers parroting the line that none of his classmates or professors remembered him. This thread is also full of comments about how nobody remembered him - far more comments about that than comments on his foreign student status. In fact, the author of the article makes the mistake of stating that nobody remembers Obama, when that's simply not true.
As conservatives, our currency in the marketplace of ideas should be facts. When we say that nobody remembers Obama from Columbia we're not dealing in facts.
Your other questions - such as how did Obama get to Columbia - are excellent questions.
My point is: I don't care if 10,000 students remember him. It's meaningless to me. I want to know if he applied as a FOREIGN student and accepted money in the form of foreign student aid. Clear and simple. If he did and actually WAS an American citizen, then he committed fraud. If he wasn't an American citizen, then he shouldn't be President now. Either way he's (Sandra) Fluked!