The CBS network's Web site has a feature on its "Late Show With David Letterman" wing: This Dave In History.
The entry for today features a great moment from Letterman's days at NBC. It was one of the funniest things I think I've ever seen on TV::
1984: Chris Elliott debuts his "Comparison Test" during a viewer mail question. Tonight, he tries to determine which is lower in cholesterol -- Peanut Oil or Corn Oil -- by drinking a pint of each. "No difference, Dave."