Practical /Prog/ Challenge

The challenge is to make a PROGWATCH program

What it does is, scans this file:
http://dis.4chan.org/prog/subject.txt
every 1 min, 10 mins or 30 seconds or so..

When a change occurs (e.g. someone makes a new post or whatever) then it should exec some program set by the user, with the given args

so for example, you could set it up to open your webbrowser for  the page, or get growl to display "New thread on /prog/, title: Ive read SICP!" etc etc

I will post mine afterwards.. anyway good luck and GO FOR IT!

My prog is finished, changed an old directory watch program I had, took half an hour. Produces output like:

Thread bumped: abelson and sussman, by Anonymous
Thread created: XXXXXXXXXXXXXX, by Anonymous

Will let it run for a bit and post my code if it works without errors.