The TL;DR version: as of the time I'm composing this post, he's alive. And there's a Web site where you can find out, at any given second, whether he still is.
More good Letterman: "David Letterman retires: His most notable interviews". This is a fine selection including two at the peak of his form, with Cher and Madonna. (How Madonna thought she would be able to mess with Dave, especially in his building with his people, is beyond my meager power to understand.)
For literally all your Star Trek needs.
Memory Alpha is a collaborative project to create the most definitive, accurate, and accessible encyclopedia and reference for everything related to Star Trek. The English-language Memory Alpha started in November 2003, and currently consists of 38,187 articles.
With an important qualification that the author is probably missing a significant component of Stewart's influence via YouTube, Tweets, and other social media, his argument is still interesting.
The "Super Bowl Was The Most Watched TV Show In US History–But It Doesn't Come Close To The Worldwide Record"
Guess what the two most watched--worldwide--events were. Go ahead, guess.
An outstanding collection, one that gives evidence that TV advertising can be, at least occasionally, be great.
A bigger collection at the LA Times, with a lot of overlap, but with some great ones missed in the previous collection, including the E-Trade babies ad.
Also on Super Bowl ads: "The unsustainable economics of Super Bowl ads".
Proof that all sitcoms are basically the same.
I draw two conclusions: 1) there's hope for rather unattractive high school kids, and 2) money spent on wardrobe, hair, and makeup does make a difference.
See also "Famous TV Show Casts: Before They Were Famous".