I had not heard this story before.

I was searching up information on Google today about a hospital I volunteered at back in 2006 (Coast General in Mombasa, Kenya)... and this is what I found:

Reports quote information that certified copies of a Kenyan Birth Certificate (BC) for Obama were sent from Kenya, and have been received by three separate individuals.

And that these documents are certified, with an embossed seal, and display the name of the hospital where Obama was born, as well as witness signatures.

(just do a search - "Obama born in Mombasa")

Here is a video I found on the subject:

http://www.youtube.com/watch?v=gA6_k3NtXZs