grahaNa

This:
http://googleblog.blogspot.com/2008/11/sorting-1pb-with-mapreduce.html

Somebody also wrote this: http://www.lunchpauze.com/2007/10/writing-hadoop-mapreduce-program-in-php.html

And this is supposed to be funny: http://www.sitepoint.com/blogs/2006/10/06/php-mapreduce/

Google FTW!