Update: Cookie Monster himself is appearing in today's doodle at Google.com.
Google is celebrating the invention of the bar code today, with its latest doodle. There is an interesting history of the barcode available on Wikipedia, which of course is the top natural result in Google's search results for barcode (which you are taken to upon clicking the doodle).
Today marks the 40th anniversary of the first moon landing, and Google seems to have goofed up the scheduling of a commemorative doodle for its homepage. But the search giant's arguably made up for that oversight (and then some) by launching Moon in Google Earth.
In the Halloween spirit, Google has of course supplied us with a "doodle" for the day, but the interesting part of this to me as fan of horror films is that the doodle was designed by Wes Craven.