Once or twice a year I will hear a familiar tune being used by the plunderers of Madison Avenue. I don't really begrudge the commercializing of public domain songs as it's usually interesting to see how they are used.
As a matter of fact, I recently saw a pretty creative commercial that uses "The Happy Wanderer" as its score; at the end, it turned out to be a commercial for monster.com.
Here it is:
Have you heard this one? Or any other commercial uses of a summer camp song?