Two notes to add to the Wikipedia article:
1. I'm assuming that David Letterman was possessed by a malign form of glee in proposing the Super Bowl commercial for LATE SHOW WITH DAVID LETTERMAN to Jay Leno--knowing that Leno's shaky hold on a "good guy" persona would take a further hit with a "can't laugh at
2. Last week, Bill Maher made his final guest appearance on THE JAY LENO SHOW.
When Maher brought up the topic of Jay's "vulnerability" (see Note #1),
Leno cut Maher off and rushed to a commercial break.
One final prediction: The Jay/Dave ratings war may be a bit more unpredictable from March onwards. Yes, Leno will be Number One some nights--and Letterman will beat him on other occasions.
And more than a few of us will opt for Coco if he finds himself on Fox or Comedy Central.