Obama's First Times
Now that the New York Times archives are open free of charge, people have been looking for notable first mentions in the newspaper of record.
Here is Barack Obama's first appearance in the Times, in 1990. He was the newly elected editor of the Harvard Law Review, and the first black to obtain that position. He was 28 years old.
Here are some more -- including the first mentions of Microsoft, The Simpsons, and Jon Stewart. (Yes, this dates back to July, but I just saw it, so it is new to me, and maybe it is new to you too.)