There exists a web site devoted to collecting and archiving programs that can count down the 99 bottles beer from the song. They have that one basic program written in 621 variations. That's just unbelievably cool.
They even have InstallScript (the language used in InstallShield Windows installers) as well! That's something the Hello World in many languages site didn't have. (I actually submitted an InstallScript hello world example to them many years ago but that site is somewhat stale.) Of course, they don't have a PHP example either (which is the simplest Hello World program known to man: you simply put the text 'hello world' in a file and PHP will happily spit it out for you.)
And while they have an example of one of my favorite langauges, Brainfuck, they are missing another of my favorite languages: Chef. So of course now I have to write a '99 bottles of beer on the wall' program in Chef and submit it.
Yes, I am a dork.
I'm glad that's finally been officially quantified.