I would act something
http://e.ggtimer.com/ when you request
http://e.ggtimer.com/5minutes the server sends the
5minutes to a script the server so it can do something.
I have an apache 2.2.17 server running on arch Linux.
If you have mod_rewrite enabled, you can add an .htaccess file to catch everything with the following rules / configuration:
This would forward every REQUEST_URI to that single script and place it as a value of the timer $_GET variable.