Watch File by Scott J. Kleper
This is a pretty clever script that demonstrates some really useful ways of 
scripting HTML Markup. This purpose of this script is to wait until a particular file appears in a particular folder. This file is then converted
and saved in the folder that the web server is in. This script would be used
if, for example, you are on a network and want other people on the network to be able to post files to the web server. Make a drop box that they toss a text file into and HTML Markup will immediately find the file, convert it, and save the converted file in the web server's folder. This script is important because it shows one way to convert files that appear when you're not around and also because it shows how to save files in folders other than the folder the source file was in.