There are at least two distinct recordings in which someone, alleged to be Obama's GrandMama, claims a) that she was present at his birth, or b) that he was born in Kenya. As Tim Johnson would say, they "are widely available on the Internet." No doubt they are widely available on FR, too. Anyway, here is the link to a recording of Obama's grandmother saying she was there, and here is one from someone on the other side of the phone interview. Here is one of her saying he is a native of her village.
I do not speak Swahili, so I must rely on the claims of the translators. I simply offer these as evidence that there are claims contradictory to those of... well, nobody, since there are no claims by anyone that they were present at his birth in Hawaii.
And there in lies a problem, neither does Obama's grandmother. So it begs the question that if this woman is speaking Swahili then who the hell is she?